18361273720612 has 48 divisors (see below), whose sum is σ = 33088827058560. Its totient is φ = 8911202197248.

The previous prime is 18361273720571. The next prime is 18361273720637. The reversal of 18361273720612 is 21602737216381.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21838288 + ... + 22663480.

It is an arithmetic number, because the mean of its divisors is an integer number (689350563720).

Almost surely, 2^{18361273720612} is an apocalyptic number.

It is an amenable number.

18361273720612 is a deficient number, since it is larger than the sum of its proper divisors (14727553337948).

18361273720612 is a wasteful number, since it uses less digits than its factorization.

18361273720612 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 826372 (or 826370 counting only the distinct ones).

The product of its (nonzero) digits is 1016064, while the sum is 49.

The spelling of 18361273720612 in words is "eighteen trillion, three hundred sixty-one billion, two hundred seventy-three million, seven hundred twenty thousand, six hundred twelve".