21244934080 has 28 divisors (see below), whose sum is σ = 50589500040. Its totient is φ = 8497973504.

The previous prime is 21244934069. The next prime is 21244934099. The reversal of 21244934080 is 8043944212.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33194890 + ... + 33195529.

Almost surely, 2^21244934080 is an apocalyptic number.

21244934080 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21244934080 is an abundant number, since it is smaller than the sum of its proper divisors (29344565960).

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

21244934080 is an equidigital number, since it uses as much as digits as its factorization.

21244934080 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66390436 (or 66390426 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 37.

The spelling of 21244934080 in words is "twenty-one billion, two hundred forty-four million, nine hundred thirty-four thousand, eighty".