18432164840 has 32 divisors (see below), whose sum is σ = 42354766080. Its totient is φ = 7215995712.

The previous prime is 18432164809. The next prime is 18432164843. The reversal of 18432164840 is 4846123481.

It is not an unprimeable number, because it can be changed into a prime (18432164843) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4900292 + ... + 4904051.

It is an arithmetic number, because the mean of its divisors is an integer number (1323586440).

Almost surely, 2^18432164840 is an apocalyptic number.

18432164840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18432164840 is an abundant number, since it is smaller than the sum of its proper divisors (23922601240).

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

18432164840 is a wasteful number, since it uses less digits than its factorization.

18432164840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9804401 (or 9804397 counting only the distinct ones).

The product of its (nonzero) digits is 147456, while the sum is 41.

The spelling of 18432164840 in words is "eighteen billion, four hundred thirty-two million, one hundred sixty-four thousand, eight hundred forty".