21602355350444 has 24 divisors (see below), whose sum is σ = 43411431806400. Its totient is φ = 9302449672080.

The previous prime is 21602355350437. The next prime is 21602355350453. The reversal of 21602355350444 is 44405355320612.

It is a Harshad number since it is a multiple of its sum of digits (44).

It is a junction number, because it is equal to n+sod(n) for n = 21602355350395 and 21602355350404.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12920068154 + ... + 12920069825.

It is an arithmetic number, because the mean of its divisors is an integer number (1808809658600).

Almost surely, 2^{21602355350444} is an apocalyptic number.

It is an amenable number.

21602355350444 is an abundant number, since it is smaller than the sum of its proper divisors (21809076455956).

21602355350444 is a wasteful number, since it uses less digits than its factorization.

21602355350444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25840138013 (or 25840138011 counting only the distinct ones).

The product of its (nonzero) digits is 1728000, while the sum is 44.

The spelling of 21602355350444 in words is "twenty-one trillion, six hundred two billion, three hundred fifty-five million, three hundred fifty thousand, four hundred forty-four".