21233641744 has 80 divisors (see below), whose sum is σ = 47545814016. Its totient is φ = 8998416000.

The previous prime is 21233641711. The next prime is 21233641769. The reversal of 21233641744 is 44714633212.

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, 3836259 + ... + 3841789.

Almost surely, 2^21233641744 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21233641744, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23772907008).

21233641744 is an abundant number, since it is smaller than the sum of its proper divisors (26312172272).

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

21233641744 is a wasteful number, since it uses less digits than its factorization.

21233641744 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5924 (or 5918 counting only the distinct ones).

The product of its digits is 96768, while the sum is 37.

The spelling of 21233641744 in words is "twenty-one billion, two hundred thirty-three million, six hundred forty-one thousand, seven hundred forty-four".