21724377304 has 64 divisors (see below), whose sum is σ = 47001427200. Its totient is φ = 9221040000.

The previous prime is 21724377287. The next prime is 21724377329. The reversal of 21724377304 is 40377342712.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2539867 + ... + 2548405.

It is an arithmetic number, because the mean of its divisors is an integer number (734397300).

Almost surely, 2^21724377304 is an apocalyptic number.

It is an amenable number.

21724377304 is an abundant number, since it is smaller than the sum of its proper divisors (25277049896).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21724377304 is a wasteful number, since it uses less digits than its factorization.

21724377304 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8984 (or 8980 counting only the distinct ones).

The product of its (nonzero) digits is 197568, while the sum is 40.

The spelling of 21724377304 in words is "twenty-one billion, seven hundred twenty-four million, three hundred seventy-seven thousand, three hundred four".