20257084904 has 24 divisors (see below), whose sum is σ = 44183183490. Its totient is φ = 8681607648.

The previous prime is 20257084879. The next prime is 20257084949. The reversal of 20257084904 is 40948075202.

It can be written as a sum of positive squares in only one way, i.e., 16384512004 + 3872572900 = 128002^2 + 62230^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 25837727 + ... + 25838510.

Almost surely, 2^20257084904 is an apocalyptic number.

It is an amenable number.

20257084904 is an abundant number, since it is smaller than the sum of its proper divisors (23926098586).

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

20257084904 is a wasteful number, since it uses less digits than its factorization.

20257084904 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51676257 (or 51676246 counting only the distinct ones).

The product of its (nonzero) digits is 161280, while the sum is 41.

The spelling of 20257084904 in words is "twenty billion, two hundred fifty-seven million, eighty-four thousand, nine hundred four".