21352304578504 has 64 divisors (see below), whose sum is σ = 42050219875200. Its totient is φ = 10150302564864.

The previous prime is 21352304578499. The next prime is 21352304578607. The reversal of 21352304578504 is 40587540325312.

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, 40885492 + ... + 41404444.

It is an arithmetic number, because the mean of its divisors is an integer number (657034685550).

Almost surely, 2^{21352304578504} is an apocalyptic number.

It is an amenable number.

21352304578504 is a deficient number, since it is larger than the sum of its proper divisors (20697915296696).

21352304578504 is a wasteful number, since it uses less digits than its factorization.

21352304578504 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 521702 (or 521698 counting only the distinct ones).

The product of its (nonzero) digits is 4032000, while the sum is 49.

The spelling of 21352304578504 in words is "twenty-one trillion, three hundred fifty-two billion, three hundred four million, five hundred seventy-eight thousand, five hundred four".