18687244836404 has 12 divisors (see below), whose sum is σ = 34423872067200. Its totient is φ = 8851852817208.

The previous prime is 18687244836313. The next prime is 18687244836439. The reversal of 18687244836404 is 40463844278681.

It is a happy number.

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, 122942400164 + ... + 122942400315.

It is an arithmetic number, because the mean of its divisors is an integer number (2868656005600).

Almost surely, 2^{18687244836404} is an apocalyptic number.

It is an amenable number.

18687244836404 is a deficient number, since it is larger than the sum of its proper divisors (15736627230796).

18687244836404 is a wasteful number, since it uses less digits than its factorization.

18687244836404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 245884800502 (or 245884800500 counting only the distinct ones).

The product of its (nonzero) digits is 198180864, while the sum is 65.

The spelling of 18687244836404 in words is "eighteen trillion, six hundred eighty-seven billion, two hundred forty-four million, eight hundred thirty-six thousand, four hundred four".