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10102031993 = 12779543559
BaseRepresentation
bin10010110100010000…
…01100011001111001
3222002000202101201002
421122020030121321
5131142110010433
64350225334345
7505223566214
oct113210143171
928060671632
1010102031993
114314374179
121b5b1973b5
13c4cb92b31
146bb92277b
153e1d149e8
hex25a20c679

10102031993 has 4 divisors (see below), whose sum is σ = 10181575680. Its totient is φ = 10022488308.

The previous prime is 10102031983. The next prime is 10102032001. The reversal of 10102031993 is 39913020101.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 10102031993 - 24 = 10102031977 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (10102031983) 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, 39771653 + ... + 39771906.

It is an arithmetic number, because the mean of its divisors is an integer number (2545393920).

Almost surely, 210102031993 is an apocalyptic number.

It is an amenable number.

10102031993 is a deficient number, since it is larger than the sum of its proper divisors (79543687).

10102031993 is an equidigital number, since it uses as much as digits as its factorization.

10102031993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79543686.

The product of its (nonzero) digits is 1458, while the sum is 29.

The spelling of 10102031993 in words is "ten billion, one hundred two million, thirty-one thousand, nine hundred ninety-three".

Divisors: 1 127 79543559 10102031993