18532428278 has 48 divisors (see below), whose sum is σ = 36657598320. Its totient is φ = 6945632064.

The previous prime is 18532428253. The next prime is 18532428281. The reversal of 18532428278 is 87282423581.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 358601 + ... + 407012.

It is an arithmetic number, because the mean of its divisors is an integer number (763699965).

Almost surely, 2^18532428278 is an apocalyptic number.

18532428278 is a deficient number, since it is larger than the sum of its proper divisors (18125170042).

18532428278 is a wasteful number, since it uses less digits than its factorization.

18532428278 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 765661 (or 765654 counting only the distinct ones).

The product of its digits is 1720320, while the sum is 50.

The spelling of 18532428278 in words is "eighteen billion, five hundred thirty-two million, four hundred twenty-eight thousand, two hundred seventy-eight".