21048755712 has 80 divisors (see below), whose sum is σ = 59026608960. Its totient is φ = 6646966272.

The previous prime is 21048755681. The next prime is 21048755713. The reversal of 21048755712 is 21755784012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21048755713) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 331438 + ... + 389805.

It is an arithmetic number, because the mean of its divisors is an integer number (737832612).

Almost surely, 2^21048755712 is an apocalyptic number.

It is an amenable number.

21048755712 is an abundant number, since it is smaller than the sum of its proper divisors (37977853248).

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

21048755712 is an equidigital number, since it uses as much as digits as its factorization.

21048755712 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 721283 (or 721267 counting only the distinct ones).

The product of its (nonzero) digits is 156800, while the sum is 42.

The spelling of 21048755712 in words is "twenty-one billion, forty-eight million, seven hundred fifty-five thousand, seven hundred twelve".