18094934638 has 16 divisors (see below), whose sum is σ = 29637172224. Its totient is φ = 8217392760.

The previous prime is 18094934621. The next prime is 18094934681. The reversal of 18094934638 is 83643949081.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 354420 + ... + 402247.

It is an arithmetic number, because the mean of its divisors is an integer number (1852323264).

Almost surely, 2^18094934638 is an apocalyptic number.

18094934638 is a deficient number, since it is larger than the sum of its proper divisors (11542237586).

18094934638 is a wasteful number, since it uses less digits than its factorization.

18094934638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 757767.

The product of its (nonzero) digits is 4478976, while the sum is 55.

The spelling of 18094934638 in words is "eighteen billion, ninety-four million, nine hundred thirty-four thousand, six hundred thirty-eight".