18406958444804 has 6 divisors (see below), whose sum is σ = 32212177278414. Its totient is φ = 9203479222400.

The previous prime is 18406958444779. The next prime is 18406958444813. The reversal of 18406958444804 is 40844485960481.

It can be written as a sum of positive squares in only one way, i.e., 12352750563904 + 6054207880900 = 3514648^2 + 2460530^2 .

It is a super-2 number, since 2×18406958444804² (a number of 27 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2300869805597 + ... + 2300869805604.

It is an arithmetic number, because the mean of its divisors is an integer number (5368696213069).

Almost surely, 2^{18406958444804} is an apocalyptic number.

It is an amenable number.

18406958444804 is a deficient number, since it is larger than the sum of its proper divisors (13805218833610).

18406958444804 is a wasteful number, since it uses less digits than its factorization.

18406958444804 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4601739611205 (or 4601739611203 counting only the distinct ones).

The product of its (nonzero) digits is 141557760, while the sum is 65.

The spelling of 18406958444804 in words is "eighteen trillion, four hundred six billion, nine hundred fifty-eight million, four hundred forty-four thousand, eight hundred four".