18196906920 has 32 divisors (see below), whose sum is σ = 54590721120. Its totient is φ = 4852508480.

The previous prime is 18196906901. The next prime is 18196906933. The reversal of 18196906920 is 2960969181.

It is a super-2 number, since 2×18196906920² (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 (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 75820326 + ... + 75820565.

It is an arithmetic number, because the mean of its divisors is an integer number (1705960035).

Almost surely, 2^18196906920 is an apocalyptic number.

18196906920 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18196906920 is an abundant number, since it is smaller than the sum of its proper divisors (36393814200).

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

18196906920 is a wasteful number, since it uses less digits than its factorization.

18196906920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 151640905 (or 151640901 counting only the distinct ones).

The product of its (nonzero) digits is 419904, while the sum is 51.

The spelling of 18196906920 in words is "eighteen billion, one hundred ninety-six million, nine hundred six thousand, nine hundred twenty".