18164745825 has 24 divisors (see below), whose sum is σ = 30037068576. Its totient is φ = 9686352000.

The previous prime is 18164745799. The next prime is 18164745827. The reversal of 18164745825 is 52854746181.

It is a happy number.

It is not a de Polignac number, because 18164745825 - 2⁸ = 18164745569 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18164745827) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 598005 + ... + 627645.

It is an arithmetic number, because the mean of its divisors is an integer number (1251544524).

Almost surely, 2^18164745825 is an apocalyptic number.

18164745825 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

18164745825 is a deficient number, since it is larger than the sum of its proper divisors (11872322751).

18164745825 is a wasteful number, since it uses less digits than its factorization.

18164745825 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37825 (or 37820 counting only the distinct ones).

The product of its digits is 2150400, while the sum is 51.

The spelling of 18164745825 in words is "eighteen billion, one hundred sixty-four million, seven hundred forty-five thousand, eight hundred twenty-five".