21330612454356 has 36 divisors (see below), whose sum is σ = 53926385740500. Its totient is φ = 7109236556928.

The previous prime is 21330612454337. The next prime is 21330612454369. The reversal of 21330612454356 is 65345421603312.

21330612454356 is a `hidden beast` number, since 2 + 1 + 3 + 30 + 6 + 1 + 24 + 543 + 56 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 4986914259600 + 16343698194756 = 2233140^2 + 4042734^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 40048201 + ... + 40577328.

Almost surely, 2^{21330612454356} is an apocalyptic number.

It is an amenable number.

21330612454356 is an abundant number, since it is smaller than the sum of its proper divisors (32595773286144).

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

21330612454356 is a wasteful number, since it uses less digits than its factorization.

21330612454356 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80632888 (or 80632883 counting only the distinct ones).

The product of its (nonzero) digits is 1555200, while the sum is 45.

The spelling of 21330612454356 in words is "twenty-one trillion, three hundred thirty billion, six hundred twelve million, four hundred fifty-four thousand, three hundred fifty-six".