21304037304021 has 8 divisors (see below), whose sum is σ = 28471288834944. Its totient is φ = 14169738654560.

The previous prime is 21304037304001. The next prime is 21304037304023. The reversal of 21304037304021 is 12040373040312.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21304037304021 - 2¹⁰ = 21304037302997 is a prime.

It is a super-2 number, since 2×21304037304021² (a number of 27 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 21304037304021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21304037304023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8238218856 + ... + 8238221441.

It is an arithmetic number, because the mean of its divisors is an integer number (3558911104368).

Almost surely, 2^{21304037304021} is an apocalyptic number.

It is an amenable number.

21304037304021 is a deficient number, since it is larger than the sum of its proper divisors (7167251530923).

21304037304021 is a wasteful number, since it uses less digits than its factorization.

21304037304021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16476440731.

The product of its (nonzero) digits is 12096, while the sum is 30.

The spelling of 21304037304021 in words is "twenty-one trillion, three hundred four billion, thirty-seven million, three hundred four thousand, twenty-one".