18354480894 has 24 divisors (see below), whose sum is σ = 39820605240. Its totient is φ = 6110073648.

The previous prime is 18354480883. The next prime is 18354480901. The reversal of 18354480894 is 49808445381.

It is a happy number.

18354480894 is a `hidden beast` number, since 1 + 8 + 3 + 544 + 8 + 0 + 8 + 94 = 666.

It is a super-2 number, since 2×18354480894² (a number of 21 digits) contains 22 as substring.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 18354480894.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 659884 + ... + 687135.

It is an arithmetic number, because the mean of its divisors is an integer number (1659191885).

Almost surely, 2^18354480894 is an apocalyptic number.

18354480894 is an abundant number, since it is smaller than the sum of its proper divisors (21466124346).

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

18354480894 is a wasteful number, since it uses less digits than its factorization.

18354480894 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1347784 (or 1347781 counting only the distinct ones).

The product of its (nonzero) digits is 4423680, while the sum is 54.

The spelling of 18354480894 in words is "eighteen billion, three hundred fifty-four million, four hundred eighty thousand, eight hundred ninety-four".