21242559375072 has 96 divisors (see below), whose sum is σ = 70808531270400. Its totient is φ = 6069302676864.

The previous prime is 21242559375031. The next prime is 21242559375073. The reversal of 21242559375072 is 27057395524212.

21242559375072 is a `hidden beast` number, since 2 + 1 + 2 + 4 + 2 + 559 + 37 + 50 + 7 + 2 = 666.

It is a tau number, because it is divible by the number of its divisors (96).

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21242559375073) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1756157922 + ... + 1756170017.

It is an arithmetic number, because the mean of its divisors is an integer number (737588867400).

Almost surely, 2^{21242559375072} is an apocalyptic number.

It is an amenable number.

21242559375072 is an abundant number, since it is smaller than the sum of its proper divisors (49565971895328).

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

21242559375072 is a wasteful number, since it uses less digits than its factorization.

21242559375072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3512327965 (or 3512327951 counting only the distinct ones).

The product of its (nonzero) digits is 10584000, while the sum is 54.

The spelling of 21242559375072 in words is "twenty-one trillion, two hundred forty-two billion, five hundred fifty-nine million, three hundred seventy-five thousand, seventy-two".