18097232390 has 16 divisors (see below), whose sum is σ = 33625825920. Its totient is φ = 7005380160.

The previous prime is 18097232383. The next prime is 18097232407. The reversal of 18097232390 is 9323279081.

It is a happy number.

It is a super-2 number, since 2×18097232390² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29188775 + ... + 29189394.

It is an arithmetic number, because the mean of its divisors is an integer number (2101614120).

Almost surely, 2^18097232390 is an apocalyptic number.

18097232390 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18097232390 is a deficient number, since it is larger than the sum of its proper divisors (15528593530).

18097232390 is a wasteful number, since it uses less digits than its factorization.

18097232390 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58378207.

The product of its (nonzero) digits is 163296, while the sum is 44.

The spelling of 18097232390 in words is "eighteen billion, ninety-seven million, two hundred thirty-two thousand, three hundred ninety".