21320232025 has 12 divisors (see below), whose sum is σ = 27828514000. Its totient is φ = 16158491280.

The previous prime is 21320232001. The next prime is 21320232071. The reversal of 21320232025 is 52023202312.

It is not a de Polignac number, because 21320232025 - 2⁵ = 21320231993 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21320231987 and 21320232005.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 22441875 + ... + 22442824.

Almost surely, 2^21320232025 is an apocalyptic number.

21320232025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

21320232025 is a deficient number, since it is larger than the sum of its proper divisors (6508281975).

21320232025 is a wasteful number, since it uses less digits than its factorization.

21320232025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44884728 (or 44884723 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 22.

Adding to 21320232025 its reverse (52023202312), we get a palindrome (73343434337).

The spelling of 21320232025 in words is "twenty-one billion, three hundred twenty million, two hundred thirty-two thousand, twenty-five".