20257980168 has 16 divisors (see below), whose sum is σ = 50644950480. Its totient is φ = 6752660048.

The previous prime is 20257980151. The next prime is 20257980199. The reversal of 20257980168 is 86108975202.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 422041230 + ... + 422041277.

It is an arithmetic number, because the mean of its divisors is an integer number (3165309405).

Almost surely, 2^20257980168 is an apocalyptic number.

It is an amenable number.

20257980168 is an abundant number, since it is smaller than the sum of its proper divisors (30386970312).

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

20257980168 is a wasteful number, since it uses less digits than its factorization.

20257980168 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 844082516 (or 844082512 counting only the distinct ones).

The product of its (nonzero) digits is 483840, while the sum is 48.

The spelling of 20257980168 in words is "twenty billion, two hundred fifty-seven million, nine hundred eighty thousand, one hundred sixty-eight".