20315256102 has 24 divisors (see below), whose sum is σ = 45436272960. Its totient is φ = 6553308240.

The previous prime is 20315256089. The next prime is 20315256113. The reversal of 20315256102 is 20165251302.

It is a happy number.

20315256102 is a `hidden beast` number, since 2 + 0 + 31 + 525 + 6 + 102 = 666.

It is a congruent number.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 18203077 + ... + 18204192.

It is an arithmetic number, because the mean of its divisors is an integer number (1893178040).

Almost surely, 2^20315256102 is an apocalyptic number.

20315256102 is an abundant number, since it is smaller than the sum of its proper divisors (25121016858).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20315256102 is a wasteful number, since it uses less digits than its factorization.

20315256102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36407308 (or 36407305 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 27.

The spelling of 20315256102 in words is "twenty billion, three hundred fifteen million, two hundred fifty-six thousand, one hundred two".