21232632 has 16 divisors (see below), whose sum is σ = 53081640. Its totient is φ = 7077536.

The previous prime is 21232571. The next prime is 21232639. The reversal of 21232632 is 23623212.

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

It is a junction number, because it is equal to n+sod(n) for n = 21232599 and 21232608.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21232639) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 442323 + ... + 442370.

Almost surely, 2^21232632 is an apocalyptic number.

It is an amenable number.

21232632 is an abundant number, since it is smaller than the sum of its proper divisors (31849008).

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

21232632 is a wasteful number, since it uses less digits than its factorization.

21232632 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 884702 (or 884698 counting only the distinct ones).

The product of its digits is 864, while the sum is 21.

The square root of 21232632 is about 4607.8880194727. Note that the first 3 decimals coincide. The cubic root of 21232632 is about 276.9074312623.

Adding to 21232632 its reverse (23623212), we get a palindrome (44855844).

The spelling of 21232632 in words is "twenty-one million, two hundred thirty-two thousand, six hundred thirty-two".