21313520404 has 48 divisors (see below), whose sum is σ = 41963334336. Its totient is φ = 9386841600.

The previous prime is 21313520383. The next prime is 21313520407. The reversal of 21313520404 is 40402531312.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21313520407) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 365187 + ... + 419509.

It is an arithmetic number, because the mean of its divisors is an integer number (874236132).

Almost surely, 2^21313520404 is an apocalyptic number.

It is an amenable number.

21313520404 is a deficient number, since it is larger than the sum of its proper divisors (20649813932).

21313520404 is a wasteful number, since it uses less digits than its factorization.

21313520404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54616 (or 54614 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 25.

The spelling of 21313520404 in words is "twenty-one billion, three hundred thirteen million, five hundred twenty thousand, four hundred four".