18381313974 has 16 divisors (see below), whose sum is σ = 37617573312. Its totient is φ = 5984613768.

The previous prime is 18381313961. The next prime is 18381313987. The reversal of 18381313974 is 47931318381.

It is an interprime number because it is at equal distance from previous prime (18381313961) and next prime (18381313987).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 35622444 + ... + 35622959.

It is an arithmetic number, because the mean of its divisors is an integer number (2351098332).

Almost surely, 2^18381313974 is an apocalyptic number.

18381313974 is an abundant number, since it is smaller than the sum of its proper divisors (19236259338).

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

18381313974 is a wasteful number, since it uses less digits than its factorization.

18381313974 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71245451.

The product of its digits is 435456, while the sum is 48.

The spelling of 18381313974 in words is "eighteen billion, three hundred eighty-one million, three hundred thirteen thousand, nine hundred seventy-four".