18521162990 has 16 divisors (see below), whose sum is σ = 36368829360. Its totient is φ = 6734968320.

The previous prime is 18521162977. The next prime is 18521163019. The reversal of 18521162990 is 9926112581.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 84186995 + ... + 84187214.

It is an arithmetic number, because the mean of its divisors is an integer number (2273051835).

Almost surely, 2^18521162990 is an apocalyptic number.

18521162990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18521162990 is a deficient number, since it is larger than the sum of its proper divisors (17847666370).

18521162990 is a wasteful number, since it uses less digits than its factorization.

18521162990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 168374227.

The product of its (nonzero) digits is 77760, while the sum is 44.

The spelling of 18521162990 in words is "eighteen billion, five hundred twenty-one million, one hundred sixty-two thousand, nine hundred ninety".