21013587404 has 6 divisors (see below), whose sum is σ = 36773777964. Its totient is φ = 10506793700.

The previous prime is 21013587403. The next prime is 21013587407. The reversal of 21013587404 is 40478531012.

It is not an unprimeable number, because it can be changed into a prime (21013587401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2626698422 + ... + 2626698429.

It is an arithmetic number, because the mean of its divisors is an integer number (6128962994).

Almost surely, 2^21013587404 is an apocalyptic number.

It is an amenable number.

21013587404 is a deficient number, since it is larger than the sum of its proper divisors (15760190560).

21013587404 is a wasteful number, since it uses less digits than its factorization.

21013587404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5253396855 (or 5253396853 counting only the distinct ones).

The product of its (nonzero) digits is 26880, while the sum is 35.

The spelling of 21013587404 in words is "twenty-one billion, thirteen million, five hundred eighty-seven thousand, four hundred four".