21322350525 has 96 divisors (see below), whose sum is σ = 42472995840. Its totient is φ = 9220538880.

The previous prime is 21322350523. The next prime is 21322350527. The reversal of 21322350525 is 52505322312.

It is an interprime number because it is at equal distance from previous prime (21322350523) and next prime (21322350527).

It is not a de Polignac number, because 21322350525 - 2¹ = 21322350523 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21322350492 and 21322350501.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21322350523) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 9505054 + ... + 9507296.

It is an arithmetic number, because the mean of its divisors is an integer number (442427040).

Almost surely, 2^21322350525 is an apocalyptic number.

21322350525 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

21322350525 is a deficient number, since it is larger than the sum of its proper divisors (21150645315).

21322350525 is a wasteful number, since it uses less digits than its factorization.

21322350525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3235 (or 3230 counting only the distinct ones).

The product of its (nonzero) digits is 18000, while the sum is 30.

Adding to 21322350525 its reverse (52505322312), we get a palindrome (73827672837).

The spelling of 21322350525 in words is "twenty-one billion, three hundred twenty-two million, three hundred fifty thousand, five hundred twenty-five".