18500162394 has 16 divisors (see below), whose sum is σ = 42286085568. Its totient is φ = 5285760672.

The previous prime is 18500162339. The next prime is 18500162407. The reversal of 18500162394 is 49326100581.

It is a super-2 number, since 2×18500162394² (a number of 21 digits) contains 22 as substring.

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, 220239987 + ... + 220240070.

It is an arithmetic number, because the mean of its divisors is an integer number (2642880348).

Almost surely, 2^18500162394 is an apocalyptic number.

18500162394 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

18500162394 is an abundant number, since it is smaller than the sum of its proper divisors (23785923174).

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

18500162394 is a wasteful number, since it uses less digits than its factorization.

18500162394 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 440480069.

The product of its (nonzero) digits is 51840, while the sum is 39.

The spelling of 18500162394 in words is "eighteen billion, five hundred million, one hundred sixty-two thousand, three hundred ninety-four".