21456074476 has 12 divisors (see below), whose sum is σ = 39756844008. Its totient is φ = 10096976192.

The previous prime is 21456074413. The next prime is 21456074483. The reversal of 21456074476 is 67447065412.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 157765186 + ... + 157765321.

It is an arithmetic number, because the mean of its divisors is an integer number (3313070334).

Almost surely, 2^21456074476 is an apocalyptic number.

It is an amenable number.

21456074476 is a deficient number, since it is larger than the sum of its proper divisors (18300769532).

21456074476 is a wasteful number, since it uses less digits than its factorization.

21456074476 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 315530528 (or 315530526 counting only the distinct ones).

The product of its (nonzero) digits is 1128960, while the sum is 46.

The spelling of 21456074476 in words is "twenty-one billion, four hundred fifty-six million, seventy-four thousand, four hundred seventy-six".