18169390690 has 16 divisors (see below), whose sum is σ = 35678076480. Its totient is φ = 6607051120.

The previous prime is 18169390669. The next prime is 18169390721. The reversal of 18169390690 is 9609396181.

It is a super-2 number, since 2×18169390690² (a number of 21 digits) contains 22 as substring.

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, 82588030 + ... + 82588249.

It is an arithmetic number, because the mean of its divisors is an integer number (2229879780).

Almost surely, 2^18169390690 is an apocalyptic number.

18169390690 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18169390690 is a deficient number, since it is larger than the sum of its proper divisors (17508685790).

18169390690 is a wasteful number, since it uses less digits than its factorization.

18169390690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 165176297.

The product of its (nonzero) digits is 629856, while the sum is 52.

The spelling of 18169390690 in words is "eighteen billion, one hundred sixty-nine million, three hundred ninety thousand, six hundred ninety".