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19701110197 = 101195060497
BaseRepresentation
bin10010010110010001…
…110001010110110101
31212212000010002112001
4102112101301112311
5310321441011242
613014531055301
71265132450026
oct222621612665
955760102461
1019701110197
11839a84375a
123999a41531
131b1c7a8272
14d4c720c4d
157a48caeb7
hex4964715b5

19701110197 has 4 divisors (see below), whose sum is σ = 19896170796. Its totient is φ = 19506049600.

The previous prime is 19701110167. The next prime is 19701110227. The reversal of 19701110197 is 79101110791.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (19701110167) and next prime (19701110227).

It can be written as a sum of positive squares in 2 ways, for example, as 13391349841 + 6309760356 = 115721^2 + 79434^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2k-19701110197 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19701110137) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 97530148 + ... + 97530349.

It is an arithmetic number, because the mean of its divisors is an integer number (4974042699).

Almost surely, 219701110197 is an apocalyptic number.

It is an amenable number.

19701110197 is a deficient number, since it is larger than the sum of its proper divisors (195060599).

19701110197 is a wasteful number, since it uses less digits than its factorization.

19701110197 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 195060598.

The product of its (nonzero) digits is 3969, while the sum is 37.

The spelling of 19701110197 in words is "nineteen billion, seven hundred one million, one hundred ten thousand, one hundred ninety-seven".

Divisors: 1 101 195060497 19701110197