21602606135005 has 32 divisors (see below), whose sum is σ = 30942860071680. Its totient is φ = 14168572669440.

The previous prime is 21602606134987. The next prime is 21602606135039. The reversal of 21602606135005 is 50053160620612.

It is not a de Polignac number, because 21602606135005 - 2²⁵ = 21602572580573 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (37).

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, 141292656 + ... + 141445465.

It is an arithmetic number, because the mean of its divisors is an integer number (966964377240).

Almost surely, 2^{21602606135005} is an apocalyptic number.

It is an amenable number.

21602606135005 is a deficient number, since it is larger than the sum of its proper divisors (9340253936675).

21602606135005 is a wasteful number, since it uses less digits than its factorization.

21602606135005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 282738229.

The product of its (nonzero) digits is 64800, while the sum is 37.

Adding to 21602606135005 its reverse (50053160620612), we get a palindrome (71655766755617).

The spelling of 21602606135005 in words is "twenty-one trillion, six hundred two billion, six hundred six million, one hundred thirty-five thousand, five".