21132332325 has 144 divisors (see below), whose sum is σ = 42402911040. Its totient is φ = 10257217920.

The previous prime is 21132332321. The next prime is 21132332359. The reversal of 21132332325 is 52323323112.

It is a happy number.

21132332325 is a `hidden beast` number, since 2 + 1 + 1 + 3 + 2 + 332 + 325 = 666.

It is not a de Polignac number, because 21132332325 - 2² = 21132332321 is a prime.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21132332321) by changing a digit.

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 143 ways as a sum of consecutive naturals, for example, 93093862 + ... + 93094088.

It is an arithmetic number, because the mean of its divisors is an integer number (294464660).

Almost surely, 2^21132332325 is an apocalyptic number.

21132332325 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

21132332325 is an abundant number, since it is smaller than the sum of its proper divisors (21270578715).

21132332325 is a wasteful number, since it uses less digits than its factorization.

21132332325 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 465 (or 351 counting only the distinct ones).

The product of its digits is 6480, while the sum is 27.

Adding to 21132332325 its reverse (52323323112), we get a palindrome (73455655437).

The spelling of 21132332325 in words is "twenty-one billion, one hundred thirty-two million, three hundred thirty-two thousand, three hundred twenty-five".