18862640026 has 4 divisors (see below), whose sum is σ = 28293960042. Its totient is φ = 9431320012.

The previous prime is 18862639933. The next prime is 18862640033. The reversal of 18862640026 is 62004626881.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 14598680625 + 4263959401 = 120825^2 + 65299^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4715660005 + ... + 4715660008.

Almost surely, 2^18862640026 is an apocalyptic number.

18862640026 is a deficient number, since it is larger than the sum of its proper divisors (9431320016).

18862640026 is an equidigital number, since it uses as much as digits as its factorization.

18862640026 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9431320015.

The product of its (nonzero) digits is 221184, while the sum is 43.

The spelling of 18862640026 in words is "eighteen billion, eight hundred sixty-two million, six hundred forty thousand, twenty-six".