21373534724064 has 24 divisors (see below), whose sum is σ = 56105528650920. Its totient is φ = 7124511574656.

The previous prime is 21373534724023. The next prime is 21373534724093. The reversal of 21373534724064 is 46042743537312.

It is a tau number, because it is divible by the number of its divisors (24).

It is a junction number, because it is equal to n+sod(n) for n = 21373534723998 and 21373534724016.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 111320493259 + ... + 111320493450.

It is an arithmetic number, because the mean of its divisors is an integer number (2337730360455).

Almost surely, 2^{21373534724064} is an apocalyptic number.

21373534724064 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

21373534724064 is an abundant number, since it is smaller than the sum of its proper divisors (34731993926856).

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

21373534724064 is a wasteful number, since it uses less digits than its factorization.

21373534724064 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 222640986722 (or 222640986714 counting only the distinct ones).

The product of its (nonzero) digits is 10160640, while the sum is 51.

The spelling of 21373534724064 in words is "twenty-one trillion, three hundred seventy-three billion, five hundred thirty-four million, seven hundred twenty-four thousand, sixty-four".