21996838224 has 60 divisors (see below), whose sum is σ = 63840629216. Its totient is φ = 7332278112.

The previous prime is 21996838207. The next prime is 21996838247. The reversal of 21996838224 is 42283869912.

It is a Harshad number since it is a multiple of its sum of digits (54).

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

It is a congruent number.

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 11 ways as a sum of consecutive naturals, for example, 2824924 + ... + 2832699.

Almost surely, 2^21996838224 is an apocalyptic number.

21996838224 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

21996838224 is an abundant number, since it is smaller than the sum of its proper divisors (41843790992).

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

21996838224 is an equidigital number, since it uses as much as digits as its factorization.

21996838224 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5657646 (or 5657628 counting only the distinct ones).

The product of its digits is 2985984, while the sum is 54.

The spelling of 21996838224 in words is "twenty-one billion, nine hundred ninety-six million, eight hundred thirty-eight thousand, two hundred twenty-four".