21925317184 has 63 divisors (see below), whose sum is σ = 44236928163. Its totient is φ = 10782010752.

The previous prime is 21925317181. The next prime is 21925317187. The reversal of 21925317184 is 48171352912.

The square root of 21925317184 is 148072.

It is a perfect power (a square), and thus also a powerful number.

It is an interprime number because it is at equal distance from previous prime (21925317181) and next prime (21925317187).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21925317184.

It is not an unprimeable number, because it can be changed into a prime (21925317181) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 98319697 + ... + 98319919.

Almost surely, 2^21925317184 is an apocalyptic number.

21925317184 is the 148072-nd square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21925317184

21925317184 is an abundant number, since it is smaller than the sum of its proper divisors (22311610979).

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

21925317184 is an frugal number, since it uses more digits than its factorization.

21925317184 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 624 (or 308 counting only the distinct ones).

The product of its digits is 120960, while the sum is 43.

The spelling of 21925317184 in words is "twenty-one billion, nine hundred twenty-five million, three hundred seventeen thousand, one hundred eighty-four".