20457867994 has 8 divisors (see below), whose sum is σ = 30753369108. Its totient is φ = 10206744960.

The previous prime is 20457867959. The next prime is 20457868001. The reversal of 20457867994 is 49976875402.

It can be written as a sum of positive squares in 2 ways, for example, as 19461645025 + 996222969 = 139505^2 + 31563^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

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, 11093367 + ... + 11095210.

Almost surely, 2^20457867994 is an apocalyptic number.

20457867994 is a deficient number, since it is larger than the sum of its proper divisors (10295501114).

20457867994 is a wasteful number, since it uses less digits than its factorization.

20457867994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22189040.

The product of its (nonzero) digits is 30481920, while the sum is 61.

The spelling of 20457867994 in words is "twenty billion, four hundred fifty-seven million, eight hundred sixty-seven thousand, nine hundred ninety-four".