18075396990 has 32 divisors (see below), whose sum is σ = 49578232320. Its totient is φ = 4131519264.

The previous prime is 18075396959. The next prime is 18075397001. The reversal of 18075396990 is 9969357081.

It is a super-2 number, since 2×18075396990² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 18075396990.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 43036450 + ... + 43036869.

It is an arithmetic number, because the mean of its divisors is an integer number (1549319760).

Almost surely, 2^18075396990 is an apocalyptic number.

18075396990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18075396990 is an abundant number, since it is smaller than the sum of its proper divisors (31502835330).

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

18075396990 is a wasteful number, since it uses less digits than its factorization.

18075396990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86073336.

The product of its (nonzero) digits is 3674160, while the sum is 57.

The spelling of 18075396990 in words is "eighteen billion, seventy-five million, three hundred ninety-six thousand, nine hundred ninety".