18189425020 has 24 divisors (see below), whose sum is σ = 41136084864. Its totient is φ = 6716095296.

The previous prime is 18189425011. The next prime is 18189425039. The reversal of 18189425020 is 2052498181.

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, 34979404 + ... + 34979923.

It is an arithmetic number, because the mean of its divisors is an integer number (1714003536).

Almost surely, 2^18189425020 is an apocalyptic number.

18189425020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18189425020 is an abundant number, since it is smaller than the sum of its proper divisors (22946659844).

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

18189425020 is a wasteful number, since it uses less digits than its factorization.

18189425020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69959349 (or 69959347 counting only the distinct ones).

The product of its (nonzero) digits is 46080, while the sum is 40.

The spelling of 18189425020 in words is "eighteen billion, one hundred eighty-nine million, four hundred twenty-five thousand, twenty".