18662389857 has 24 divisors (see below), whose sum is σ = 27363290240. Its totient is φ = 12254729760.

The previous prime is 18662389843. The next prime is 18662389859. The reversal of 18662389857 is 75898326681.

It is not a de Polignac number, because 18662389857 - 2⁴ = 18662389841 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 18662389794 and 18662389803.

It is not an unprimeable number, because it can be changed into a prime (18662389859) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 268158 + ... + 330504.

Almost surely, 2^18662389857 is an apocalyptic number.

It is an amenable number.

18662389857 is a deficient number, since it is larger than the sum of its proper divisors (8700900383).

18662389857 is a wasteful number, since it uses less digits than its factorization.

18662389857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62853 (or 62850 counting only the distinct ones).

The product of its digits is 34836480, while the sum is 63.

The spelling of 18662389857 in words is "eighteen billion, six hundred sixty-two million, three hundred eighty-nine thousand, eight hundred fifty-seven".