18107723434 has 16 divisors (see below), whose sum is σ = 28761843528. Its totient is φ = 8520535552.

The previous prime is 18107723377. The next prime is 18107723449. The reversal of 18107723434 is 43432770181.

It can be written as a sum of positive squares in 4 ways, for example, as 16459607025 + 1648116409 = 128295^2 + 40597^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 666582 + ... + 693214.

Almost surely, 2^18107723434 is an apocalyptic number.

18107723434 is a deficient number, since it is larger than the sum of its proper divisors (10654120094).

18107723434 is a wasteful number, since it uses less digits than its factorization.

18107723434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46649.

The product of its (nonzero) digits is 112896, while the sum is 40.

The spelling of 18107723434 in words is "eighteen billion, one hundred seven million, seven hundred twenty-three thousand, four hundred thirty-four".