21276355404 has 48 divisors (see below), whose sum is σ = 50601384288. Its totient is φ = 6955573248.

The previous prime is 21276355393. The next prime is 21276355417. The reversal of 21276355404 is 40455367212.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2193814 + ... + 2203490.

It is an arithmetic number, because the mean of its divisors is an integer number (1054195506).

Almost surely, 2^21276355404 is an apocalyptic number.

It is an amenable number.

21276355404 is an abundant number, since it is smaller than the sum of its proper divisors (29325028884).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21276355404 is a wasteful number, since it uses less digits than its factorization.

21276355404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13194 (or 13192 counting only the distinct ones).

The product of its (nonzero) digits is 201600, while the sum is 39.

The spelling of 21276355404 in words is "twenty-one billion, two hundred seventy-six million, three hundred fifty-five thousand, four hundred four".