20257043600 has 60 divisors (see below), whose sum is σ = 51530361444. Its totient is φ = 7626178560.

The previous prime is 20257043581. The next prime is 20257043623. The reversal of 20257043600 is 634075202.

It can be written as a sum of positive squares in 6 ways, for example, as 1396965376 + 18860078224 = 37376^2 + 137332^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1482689 + ... + 1496288.

Almost surely, 2^20257043600 is an apocalyptic number.

20257043600 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20257043600 is an abundant number, since it is smaller than the sum of its proper divisors (31273317844).

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

20257043600 is a wasteful number, since it uses less digits than its factorization.

20257043600 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2979012 (or 2979001 counting only the distinct ones).

The product of its (nonzero) digits is 10080, while the sum is 29.

The spelling of 20257043600 in words is "twenty billion, two hundred fifty-seven million, forty-three thousand, six hundred".