21233452944 has 40 divisors (see below), whose sum is σ = 59839732512. Its totient is φ = 6434379520.

The previous prime is 21233452921. The next prime is 21233452991. The reversal of 21233452944 is 44925433212.

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 7 ways as a sum of consecutive naturals, for example, 20106909 + ... + 20107964.

Almost surely, 2^21233452944 is an apocalyptic number.

21233452944 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

21233452944 is an abundant number, since it is smaller than the sum of its proper divisors (38606279568).

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

21233452944 is a wasteful number, since it uses less digits than its factorization.

21233452944 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40214895 (or 40214889 counting only the distinct ones).

The product of its digits is 207360, while the sum is 39.

The spelling of 21233452944 in words is "twenty-one billion, two hundred thirty-three million, four hundred fifty-two thousand, nine hundred forty-four".