21364734604 has 24 divisors (see below), whose sum is σ = 39496186800. Its totient is φ = 10084112640.

The previous prime is 21364734557. The next prime is 21364734607. The reversal of 21364734604 is 40643746312.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (21364734607) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 478849 + ... + 521560.

It is an arithmetic number, because the mean of its divisors is an integer number (1645674450).

Almost surely, 2^21364734604 is an apocalyptic number.

It is an amenable number.

21364734604 is a deficient number, since it is larger than the sum of its proper divisors (18131452196).

21364734604 is a wasteful number, since it uses less digits than its factorization.

21364734604 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1000713 (or 1000711 counting only the distinct ones).

The product of its (nonzero) digits is 290304, while the sum is 40.

The spelling of 21364734604 in words is "twenty-one billion, three hundred sixty-four million, seven hundred thirty-four thousand, six hundred four".