20931654252 has 24 divisors (see below), whose sum is σ = 50964028416. Its totient is φ = 6673860688.

The previous prime is 20931654223. The next prime is 20931654301. The reversal of 20931654252 is 25245613902.

It is a self number, because there is not a number n which added to its sum of digits gives 20931654252.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 37919388 + ... + 37919939.

It is an arithmetic number, because the mean of its divisors is an integer number (2123501184).

Almost surely, 2^20931654252 is an apocalyptic number.

It is an amenable number.

20931654252 is an abundant number, since it is smaller than the sum of its proper divisors (30032374164).

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

20931654252 is a wasteful number, since it uses less digits than its factorization.

20931654252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75839357 (or 75839355 counting only the distinct ones).

The product of its (nonzero) digits is 129600, while the sum is 39.

The spelling of 20931654252 in words is "twenty billion, nine hundred thirty-one million, six hundred fifty-four thousand, two hundred fifty-two".