18361632 has 48 divisors (see below), whose sum is σ = 51039072. Its totient is φ = 5760000.

The previous prime is 18361627. The next prime is 18361633. The reversal of 18361632 is 23616381.

It is a tau number, because it is divible by the number of its divisors (48).

It is a nude number because it is divisible by every one of its digits.

It is an alternating number because its digits alternate between odd and even.

It is a self number, because there is not a number n which added to its sum of digits gives 18361632.

It is not an unprimeable number, because it can be changed into a prime (18361633) 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, 3994 + ... + 7257.

It is an arithmetic number, because the mean of its divisors is an integer number (1063314).

Almost surely, 2^18361632 is an apocalyptic number.

18361632 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

18361632 is an abundant number, since it is smaller than the sum of its proper divisors (32677440).

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

18361632 is a wasteful number, since it uses less digits than its factorization.

18361632 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11281 (or 11273 counting only the distinct ones).

The product of its digits is 5184, while the sum is 30.

The square root of 18361632 is about 4285.0474909854. The cubic root of 18361632 is about 263.8175966840.

The spelling of 18361632 in words is "eighteen million, three hundred sixty-one thousand, six hundred thirty-two".