18722427970 has 8 divisors (see below), whose sum is σ = 33700370364. Its totient is φ = 7488971184.

The previous prime is 18722427967. The next prime is 18722428001. The reversal of 18722427970 is 7972422781.

It can be written as a sum of positive squares in 2 ways, for example, as 17720135689 + 1002292281 = 133117^2 + 31659^2 .

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, 936121389 + ... + 936121408.

Almost surely, 2^18722427970 is an apocalyptic number.

18722427970 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18722427970 is a deficient number, since it is larger than the sum of its proper divisors (14977942394).

18722427970 is a wasteful number, since it uses less digits than its factorization.

18722427970 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1872242804.

The product of its (nonzero) digits is 790272, while the sum is 49.

The spelling of 18722427970 in words is "eighteen billion, seven hundred twenty-two million, four hundred twenty-seven thousand, nine hundred seventy".