21232755135 has 24 divisors (see below), whose sum is σ = 37990652544. Its totient is φ = 10958840640.

The previous prime is 21232755127. The next prime is 21232755161. The reversal of 21232755135 is 53155723212.

It is not a de Polignac number, because 21232755135 - 2³ = 21232755127 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21232755135.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7608912 + ... + 7611701.

It is an arithmetic number, because the mean of its divisors is an integer number (1582943856).

Almost surely, 2^21232755135 is an apocalyptic number.

21232755135 is a deficient number, since it is larger than the sum of its proper divisors (16757897409).

21232755135 is a wasteful number, since it uses less digits than its factorization.

21232755135 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15220655 (or 15220652 counting only the distinct ones).

The product of its digits is 63000, while the sum is 36.

The spelling of 21232755135 in words is "twenty-one billion, two hundred thirty-two million, seven hundred fifty-five thousand, one hundred thirty-five".