21072410135 has 32 divisors (see below), whose sum is σ = 30355679232. Its totient is φ = 13729795200.

The previous prime is 21072410119. The next prime is 21072410207. The reversal of 21072410135 is 53101427012.

It is not a de Polignac number, because 21072410135 - 2⁴ = 21072410119 is a prime.

It is a Duffinian 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, 34877 + ... + 208233.

It is an arithmetic number, because the mean of its divisors is an integer number (948614976).

Almost surely, 2^21072410135 is an apocalyptic number.

21072410135 is a deficient number, since it is larger than the sum of its proper divisors (9283269097).

21072410135 is a wasteful number, since it uses less digits than its factorization.

21072410135 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 173543.

The product of its (nonzero) digits is 1680, while the sum is 26.

Adding to 21072410135 its reverse (53101427012), we get a palindrome (74173837147).

The spelling of 21072410135 in words is "twenty-one billion, seventy-two million, four hundred ten thousand, one hundred thirty-five".