18090955087 has 4 divisors (see below), whose sum is σ = 18532197936. Its totient is φ = 17649712240.

The previous prime is 18090955037. The next prime is 18090955111. The reversal of 18090955087 is 78055909081.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 18090955087 - 2¹⁵ = 18090922319 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18090955007) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 220621363 + ... + 220621444.

It is an arithmetic number, because the mean of its divisors is an integer number (4633049484).

Almost surely, 2^18090955087 is an apocalyptic number.

18090955087 is a deficient number, since it is larger than the sum of its proper divisors (441242849).

18090955087 is an equidigital number, since it uses as much as digits as its factorization.

18090955087 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 441242848.

The product of its (nonzero) digits is 907200, while the sum is 52.

The spelling of 18090955087 in words is "eighteen billion, ninety million, nine hundred fifty-five thousand, eighty-seven".