21602426560374 has 64 divisors (see below), whose sum is σ = 47920096846080. Its totient is φ = 6436877328000.

The previous prime is 21602426560369. The next prime is 21602426560417. The reversal of 21602426560374 is 47306562420612.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 12169089 + ... + 13830819.

It is an arithmetic number, because the mean of its divisors is an integer number (748751513220).

Almost surely, 2^{21602426560374} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21602426560374, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23960048423040).

21602426560374 is an abundant number, since it is smaller than the sum of its proper divisors (26317670285706).

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

21602426560374 is a wasteful number, since it uses less digits than its factorization.

21602426560374 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1665037.

The product of its (nonzero) digits is 2903040, while the sum is 48.

Adding to 21602426560374 its reverse (47306562420612), we get a palindrome (68908988980986).

The spelling of 21602426560374 in words is "twenty-one trillion, six hundred two billion, four hundred twenty-six million, five hundred sixty thousand, three hundred seventy-four".