21133204232 has 64 divisors (see below), whose sum is σ = 45617109120. Its totient is φ = 8990995968.

The previous prime is 21133204229. The next prime is 21133204247. The reversal of 21133204232 is 23240233112.

It is a super-2 number, since 2×21133204232² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21133204198 and 21133204207.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4739348 + ... + 4743804.

It is an arithmetic number, because the mean of its divisors is an integer number (712767330).

Almost surely, 2^21133204232 is an apocalyptic number.

It is an amenable number.

21133204232 is an abundant number, since it is smaller than the sum of its proper divisors (24483904888).

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

21133204232 is a wasteful number, since it uses less digits than its factorization.

21133204232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5070 (or 5066 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 23.

Adding to 21133204232 its reverse (23240233112), we get a palindrome (44373437344).

The spelling of 21133204232 in words is "twenty-one billion, one hundred thirty-three million, two hundred four thousand, two hundred thirty-two".