21602661341037 has 24 divisors (see below), whose sum is σ = 33574409392032. Its totient is φ = 12319236568800.

The previous prime is 21602661341033. The next prime is 21602661341071. The reversal of 21602661341037 is 73014316620612.

It is not a de Polignac number, because 21602661341037 - 2² = 21602661341033 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21602661341037.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21602661341033) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 149578414 + ... + 149722767.

It is an arithmetic number, because the mean of its divisors is an integer number (1398933724668).

Almost surely, 2^{21602661341037} is an apocalyptic number.

It is an amenable number.

21602661341037 is a deficient number, since it is larger than the sum of its proper divisors (11971748050995).

21602661341037 is a wasteful number, since it uses less digits than its factorization.

21602661341037 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 299301689 (or 299301682 counting only the distinct ones).

The product of its (nonzero) digits is 217728, while the sum is 42.

Adding to 21602661341037 its reverse (73014316620612), we get a palindrome (94616977961649).

The spelling of 21602661341037 in words is "twenty-one trillion, six hundred two billion, six hundred sixty-one million, three hundred forty-one thousand, thirty-seven".