21322530264 has 32 divisors (see below), whose sum is σ = 60921515520. Its totient is φ = 6092151456.

The previous prime is 21322530263. The next prime is 21322530269. The reversal of 21322530264 is 46203522312.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21322530263) 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, 63459744 + ... + 63460079.

It is an arithmetic number, because the mean of its divisors is an integer number (1903797360).

Almost surely, 2^21322530264 is an apocalyptic number.

21322530264 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

21322530264 is an abundant number, since it is smaller than the sum of its proper divisors (39598985256).

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

21322530264 is a wasteful number, since it uses less digits than its factorization.

21322530264 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 126919839 (or 126919835 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 30.

The spelling of 21322530264 in words is "twenty-one billion, three hundred twenty-two million, five hundred thirty thousand, two hundred sixty-four".