20857760925 has 24 divisors (see below), whose sum is σ = 34520034624. Its totient is φ = 11112783360.

The previous prime is 20857760863. The next prime is 20857760981. The reversal of 20857760925 is 52906775802.

It is not a de Polignac number, because 20857760925 - 2¹³ = 20857752733 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 67732 + ... + 215181.

It is an arithmetic number, because the mean of its divisors is an integer number (1438334776).

Almost surely, 2^20857760925 is an apocalyptic number.

20857760925 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20857760925 is a deficient number, since it is larger than the sum of its proper divisors (13662273699).

20857760925 is a wasteful number, since it uses less digits than its factorization.

20857760925 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 283909 (or 283904 counting only the distinct ones).

The product of its (nonzero) digits is 2116800, while the sum is 51.

The spelling of 20857760925 in words is "twenty billion, eight hundred fifty-seven million, seven hundred sixty thousand, nine hundred twenty-five".