18712632463636 has 12 divisors (see below), whose sum is σ = 33053154539328. Its totient is φ = 9268874023832.

The previous prime is 18712632463619. The next prime is 18712632463661. The reversal of 18712632463636 is 63636423621781.

It is a happy number.

It is a super-2 number, since 2×18712632463636² (a number of 27 digits) contains 22 as substring.

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, 21860551516 + ... + 21860552371.

It is an arithmetic number, because the mean of its divisors is an integer number (2754429544944).

Almost surely, 2^{18712632463636} is an apocalyptic number.

It is an amenable number.

18712632463636 is a deficient number, since it is larger than the sum of its proper divisors (14340522075692).

18712632463636 is a wasteful number, since it uses less digits than its factorization.

18712632463636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43721103998 (or 43721103996 counting only the distinct ones).

The product of its digits is 31352832, while the sum is 58.

The spelling of 18712632463636 in words is "eighteen trillion, seven hundred twelve billion, six hundred thirty-two million, four hundred sixty-three thousand, six hundred thirty-six".