18470878516 has 12 divisors (see below), whose sum is σ = 32657275588. Its totient is φ = 9140228352.

The previous prime is 18470878501. The next prime is 18470878523. The reversal of 18470878516 is 61587807481.

It can be written as a sum of positive squares in 2 ways, for example, as 12102200100 + 6368678416 = 110010^2 + 79804^2 .

It is a hoax number, since the sum of its digits (55) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

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, 23802291 + ... + 23803066.

Almost surely, 2^18470878516 is an apocalyptic number.

It is an amenable number.

18470878516 is a deficient number, since it is larger than the sum of its proper divisors (14186397072).

18470878516 is a wasteful number, since it uses less digits than its factorization.

18470878516 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47605458 (or 47605456 counting only the distinct ones).

The product of its (nonzero) digits is 3010560, while the sum is 55.

The spelling of 18470878516 in words is "eighteen billion, four hundred seventy million, eight hundred seventy-eight thousand, five hundred sixteen".