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20106263 = 107187909
BaseRepresentation
bin100110010110…
…0110000010111
31101211111121102
41030230300113
520121400023
61554540315
7332620562
oct114546027
941744542
1020106263
1110393151
12689769b
13421c8c8
1429554d9
151b72628
hex132cc17

20106263 has 4 divisors (see below), whose sum is σ = 20294280. Its totient is φ = 19918248.

The previous prime is 20106253. The next prime is 20106283. The reversal of 20106263 is 36260102.

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

It is a cyclic number.

It is not a de Polignac number, because 20106263 - 28 = 20106007 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 (20106253) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 93848 + ... + 94061.

It is an arithmetic number, because the mean of its divisors is an integer number (5073570).

Almost surely, 220106263 is an apocalyptic number.

20106263 is a deficient number, since it is larger than the sum of its proper divisors (188017).

20106263 is a wasteful number, since it uses less digits than its factorization.

20106263 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 188016.

The product of its (nonzero) digits is 432, while the sum is 20.

The square root of 20106263 is about 4484.0007805530. Note that the first 3 decimals coincide. The cubic root of 20106263 is about 271.9216496866.

Adding to 20106263 its reverse (36260102), we get a palindrome (56366365).

The spelling of 20106263 in words is "twenty million, one hundred six thousand, two hundred sixty-three".

Divisors: 1 107 187909 20106263