21233312232 has 64 divisors (see below), whose sum is σ = 58890585600. Its totient is φ = 6325275840.

The previous prime is 21233312209. The next prime is 21233312263. The reversal of 21233312232 is 23221333212.

It is a Harshad number since it is a multiple of its sum of digits (24).

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 666028 + ... + 697179.

It is an arithmetic number, because the mean of its divisors is an integer number (920165400).

Almost surely, 2^21233312232 is an apocalyptic number.

21233312232 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

21233312232 is an abundant number, since it is smaller than the sum of its proper divisors (37657273368).

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

21233312232 is a wasteful number, since it uses less digits than its factorization.

21233312232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1363286 (or 1363282 counting only the distinct ones).

The product of its digits is 2592, while the sum is 24.

Adding to 21233312232 its reverse (23221333212), we get a palindrome (44454645444).

The spelling of 21233312232 in words is "twenty-one billion, two hundred thirty-three million, three hundred twelve thousand, two hundred thirty-two".