18986032457 has 16 divisors (see below), whose sum is σ = 22058373120. Its totient is φ = 16005466512.

The previous prime is 18986032409. The next prime is 18986032459. The reversal of 18986032457 is 75423068981.

It is not a de Polignac number, because 18986032457 - 2²⁸ = 18717597001 is a prime.

It is a Smith number, since the sum of its digits (53) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 18986032399 and 18986032408.

It is not an unprimeable number, because it can be changed into a prime (18986032459) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 56294 + ... + 202832.

It is an arithmetic number, because the mean of its divisors is an integer number (1378648320).

It is a 1-persistent number, because it is pandigital, but 2⋅18986032457 = 37972064914 is not.

Almost surely, 2^18986032457 is an apocalyptic number.

It is an amenable number.

18986032457 is a deficient number, since it is larger than the sum of its proper divisors (3072340663).

18986032457 is a wasteful number, since it uses less digits than its factorization.

18986032457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 146852.

The product of its (nonzero) digits is 2903040, while the sum is 53.

The spelling of 18986032457 in words is "eighteen billion, nine hundred eighty-six million, thirty-two thousand, four hundred fifty-seven".