18323618044637 has 16 divisors (see below), whose sum is σ = 19249348550400. Its totient is φ = 17408650723200.

The previous prime is 18323618044601. The next prime is 18323618044649. The reversal of 18323618044637 is 73644081632381.

It is a cyclic number.

It is not a de Polignac number, because 18323618044637 - 2¹⁶ = 18323617979101 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18323618044687) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 107251712 + ... + 107422422.

It is an arithmetic number, because the mean of its divisors is an integer number (1203084284400).

Almost surely, 2^{18323618044637} is an apocalyptic number.

It is an amenable number.

18323618044637 is a deficient number, since it is larger than the sum of its proper divisors (925730505763).

18323618044637 is a wasteful number, since it uses less digits than its factorization.

18323618044637 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 202204.

The product of its (nonzero) digits is 13934592, while the sum is 56.

The spelling of 18323618044637 in words is "eighteen trillion, three hundred twenty-three billion, six hundred eighteen million, forty-four thousand, six hundred thirty-seven".