18109628690 has 16 divisors (see below), whose sum is σ = 32779442880. Its totient is φ = 7203382320.

The previous prime is 18109628687. The next prime is 18109628737. The reversal of 18109628690 is 9682690181.

It is a happy number.

It is a super-2 number, since 2×18109628690² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5056766 + ... + 5060345.

It is an arithmetic number, because the mean of its divisors is an integer number (2048715180).

Almost surely, 2^18109628690 is an apocalyptic number.

18109628690 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18109628690 is a deficient number, since it is larger than the sum of its proper divisors (14669814190).

18109628690 is a wasteful number, since it uses less digits than its factorization.

18109628690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10117297.

The product of its (nonzero) digits is 373248, while the sum is 50.

The spelling of 18109628690 in words is "eighteen billion, one hundred nine million, six hundred twenty-eight thousand, six hundred ninety".