20131632 has 40 divisors (see below), whose sum is σ = 57786480. Its totient is φ = 6710400.

The previous prime is 20131609. The next prime is 20131667. The reversal of 20131632 is 23613102.

20131632 is a `hidden beast` number, since 2 + 0 + 1 + 31 + 632 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22869 + ... + 23732.

It is an arithmetic number, because the mean of its divisors is an integer number (1444662).

Almost surely, 2^20131632 is an apocalyptic number.

It is an amenable number.

20131632 is an abundant number, since it is smaller than the sum of its proper divisors (37654848).

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

20131632 is a wasteful number, since it uses less digits than its factorization.

20131632 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46618 (or 46606 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

The square root of 20131632 is about 4486.8287241659. The cubic root of 20131632 is about 272.0359669855.

Adding to 20131632 its reverse (23613102), we get a palindrome (43744734).

The spelling of 20131632 in words is "twenty million, one hundred thirty-one thousand, six hundred thirty-two".