18423723831154 has 4 divisors (see below), whose sum is σ = 27635585746734. Its totient is φ = 9211861915576.

The previous prime is 18423723831143. The next prime is 18423723831217. The reversal of 18423723831154 is 45113832732481.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 16001016016129 + 2422707815025 = 4000127^2 + 1556505^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4605930957787 + ... + 4605930957790.

Almost surely, 2^{18423723831154} is an apocalyptic number.

18423723831154 is a deficient number, since it is larger than the sum of its proper divisors (9211861915580).

18423723831154 is an equidigital number, since it uses as much as digits as its factorization.

18423723831154 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9211861915579.

The product of its digits is 3870720, while the sum is 52.

The spelling of 18423723831154 in words is "eighteen trillion, four hundred twenty-three billion, seven hundred twenty-three million, eight hundred thirty-one thousand, one hundred fifty-four".