31818512004 has 48 divisors (see below), whose sum is σ = 75101260416. Its totient is φ = 10484294400.

The previous prime is 31818511987. The next prime is 31818512017. The reversal of 31818512004 is 40021581813.

It is a super-2 number, since 2×31818512004² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 318864 + ... + 406584.

It is an arithmetic number, because the mean of its divisors is an integer number (1564609592).

Almost surely, 2^31818512004 is an apocalyptic number.

It is an amenable number.

31818512004 is an abundant number, since it is smaller than the sum of its proper divisors (43282748412).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

31818512004 is a wasteful number, since it uses less digits than its factorization.

31818512004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88076 (or 88074 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 33.

The spelling of 31818512004 in words is "thirty-one billion, eight hundred eighteen million, five hundred twelve thousand, four".