18918358934 has 16 divisors (see below), whose sum is σ = 28682359200. Its totient is φ = 9357842304.

The previous prime is 18918358913. The next prime is 18918359041. The reversal of 18918358934 is 43985381981.

It is a congruent number.

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, 73982 + ... + 208110.

It is an arithmetic number, because the mean of its divisors is an integer number (1792647450).

Almost surely, 2^18918358934 is an apocalyptic number.

18918358934 is a deficient number, since it is larger than the sum of its proper divisors (9764000266).

18918358934 is a wasteful number, since it uses less digits than its factorization.

18918358934 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 134887.

The product of its digits is 7464960, while the sum is 59.

The spelling of 18918358934 in words is "eighteen billion, nine hundred eighteen million, three hundred fifty-eight thousand, nine hundred thirty-four".