18068156634 has 16 divisors (see below), whose sum is σ = 39421432800. Its totient is φ = 5475198960.

The previous prime is 18068156581. The next prime is 18068156641. The reversal of 18068156634 is 43665186081.

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, 136879909 + ... + 136880040.

It is an arithmetic number, because the mean of its divisors is an integer number (2463839550).

Almost surely, 2^18068156634 is an apocalyptic number.

18068156634 is an abundant number, since it is smaller than the sum of its proper divisors (21353276166).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18068156634 is a wasteful number, since it uses less digits than its factorization.

18068156634 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 273759965.

The product of its (nonzero) digits is 829440, while the sum is 48.

The spelling of 18068156634 in words is "eighteen billion, sixty-eight million, one hundred fifty-six thousand, six hundred thirty-four".