21135260404 has 96 divisors (see below), whose sum is σ = 40641108480. Its totient is φ = 9580032000.

The previous prime is 21135260351. The next prime is 21135260423. The reversal of 21135260404 is 40406253112.

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, 43398649 + ... + 43399135.

It is an arithmetic number, because the mean of its divisors is an integer number (423344880).

Almost surely, 2^21135260404 is an apocalyptic number.

It is an amenable number.

21135260404 is a deficient number, since it is larger than the sum of its proper divisors (19505848076).

21135260404 is a wasteful number, since it uses less digits than its factorization.

21135260404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 769 (or 767 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 28.

The spelling of 21135260404 in words is "twenty-one billion, one hundred thirty-five million, two hundred sixty thousand, four hundred four".