21623063332544 has 56 divisors (see below), whose sum is σ = 44515781925840. Its totient is φ = 10408637152256.

The previous prime is 21623063332531. The next prime is 21623063332547. The reversal of 21623063332544 is 44523336032612.

It is a junction number, because it is equal to n+sod(n) for n = 21623063332495 and 21623063332504.

It is not an unprimeable number, because it can be changed into a prime (21623063332547) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16143227 + ... + 17431290.

Almost surely, 2^{21623063332544} is an apocalyptic number.

It is an amenable number.

21623063332544 is an abundant number, since it is smaller than the sum of its proper divisors (22892718593296).

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

21623063332544 is a wasteful number, since it uses less digits than its factorization.

21623063332544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33574905 (or 33574895 counting only the distinct ones).

The product of its (nonzero) digits is 1866240, while the sum is 44.

The spelling of 21623063332544 in words is "twenty-one trillion, six hundred twenty-three billion, sixty-three million, three hundred thirty-two thousand, five hundred forty-four".