18250891446 has 48 divisors (see below), whose sum is σ = 38608674624. Its totient is φ = 5750779248.

The previous prime is 18250891441. The next prime is 18250891447. The reversal of 18250891446 is 64419805281.

It is a hoax number, since the sum of its digits (48) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 18250891395 and 18250891404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18250891441) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1002501 + ... + 1020543.

It is an arithmetic number, because the mean of its divisors is an integer number (804347388).

Almost surely, 2^18250891446 is an apocalyptic number.

18250891446 is an abundant number, since it is smaller than the sum of its proper divisors (20357783178).

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

18250891446 is a wasteful number, since it uses less digits than its factorization.

18250891446 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18553 (or 18534 counting only the distinct ones).

The product of its (nonzero) digits is 552960, while the sum is 48.

The spelling of 18250891446 in words is "eighteen billion, two hundred fifty million, eight hundred ninety-one thousand, four hundred forty-six".