21233031132 has 48 divisors (see below), whose sum is σ = 49991864832. Its totient is φ = 7013926080.

The previous prime is 21233031109. The next prime is 21233031163. The reversal of 21233031132 is 23113033212.

It is a super-2 number, since 2×21233031132² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21233031099 and 21233031108.

It is a congruent number.

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, 629193 + ... + 662079.

It is an arithmetic number, because the mean of its divisors is an integer number (1041497184).

Almost surely, 2^21233031132 is an apocalyptic number.

It is an amenable number.

21233031132 is an abundant number, since it is smaller than the sum of its proper divisors (28758833700).

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

21233031132 is a wasteful number, since it uses less digits than its factorization.

21233031132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33378 (or 33376 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 21.

Adding to 21233031132 its reverse (23113033212), we get a palindrome (44346064344).

The spelling of 21233031132 in words is "twenty-one billion, two hundred thirty-three million, thirty-one thousand, one hundred thirty-two".