18057856634 has 16 divisors (see below), whose sum is σ = 27133675008. Its totient is φ = 9013313232.

The previous prime is 18057856631. The next prime is 18057856667. The reversal of 18057856634 is 43665875081.

It is a Smith number, since the sum of its digits (53) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (18057856631) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4142384 + ... + 4146740.

It is an arithmetic number, because the mean of its divisors is an integer number (1695854688).

Almost surely, 2^18057856634 is an apocalyptic number.

18057856634 is a deficient number, since it is larger than the sum of its proper divisors (9075818374).

18057856634 is a wasteful number, since it uses less digits than its factorization.

18057856634 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7469.

The product of its (nonzero) digits is 4838400, while the sum is 53.

The spelling of 18057856634 in words is "eighteen billion, fifty-seven million, eight hundred fifty-six thousand, six hundred thirty-four".