21322304525 has 12 divisors (see below), whose sum is σ = 27292550784. Its totient is φ = 16507590000.

The previous prime is 21322304513. The next prime is 21322304533. The reversal of 21322304525 is 52540322312.

It is not a de Polignac number, because 21322304525 - 2¹⁸ = 21322042381 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 13755551 + ... + 13757100.

It is an arithmetic number, because the mean of its divisors is an integer number (2274379232).

Almost surely, 2^21322304525 is an apocalyptic number.

21322304525 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

21322304525 is a deficient number, since it is larger than the sum of its proper divisors (5970246259).

21322304525 is a wasteful number, since it uses less digits than its factorization.

21322304525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27512692 (or 27512687 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 29.

Adding to 21322304525 its reverse (52540322312), we get a palindrome (73862626837).

The spelling of 21322304525 in words is "twenty-one billion, three hundred twenty-two million, three hundred four thousand, five hundred twenty-five".