18090087534 has 20 divisors (see below), whose sum is σ = 40535196504. Its totient is φ = 6030029124.

The previous prime is 18090087529. The next prime is 18090087551. The reversal of 18090087534 is 43578009081.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 18090087534.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 55833442 + ... + 55833765.

Almost surely, 2^18090087534 is an apocalyptic number.

18090087534 is an abundant number, since it is smaller than the sum of its proper divisors (22445108970).

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

18090087534 is a wasteful number, since it uses less digits than its factorization.

18090087534 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111667221 (or 111667212 counting only the distinct ones).

The product of its (nonzero) digits is 241920, while the sum is 45.

The spelling of 18090087534 in words is "eighteen billion, ninety million, eighty-seven thousand, five hundred thirty-four".