21232425353 has 8 divisors (see below), whose sum is σ = 21994678440. Its totient is φ = 20481809920.

The previous prime is 21232425329. The next prime is 21232425391. The reversal of 21232425353 is 35352423212.

It can be written as a sum of positive squares in 4 ways, for example, as 1926156544 + 19306268809 = 43888^2 + 138947^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21232425353 - 2⁶ = 21232425289 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21232425953) 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, 2905700 + ... + 2912997.

It is an arithmetic number, because the mean of its divisors is an integer number (2749334805).

Almost surely, 2^21232425353 is an apocalyptic number.

It is an amenable number.

21232425353 is a deficient number, since it is larger than the sum of its proper divisors (762253087).

21232425353 is an equidigital number, since it uses as much as digits as its factorization.

21232425353 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5818827.

The product of its digits is 43200, while the sum is 32.

Adding to 21232425353 its reverse (35352423212), we get a palindrome (56584848565).

The spelling of 21232425353 in words is "twenty-one billion, two hundred thirty-two million, four hundred twenty-five thousand, three hundred fifty-three".