21234132425 has 24 divisors (see below), whose sum is σ = 28781282880. Its totient is φ = 15412203200.

The previous prime is 21234132389. The next prime is 21234132431. The reversal of 21234132425 is 52423143212.

It is not a de Polignac number, because 21234132425 - 2²⁴ = 21217355209 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 61571 + ... + 215079.

It is an arithmetic number, because the mean of its divisors is an integer number (1199220120).

Almost surely, 2^21234132425 is an apocalyptic number.

21234132425 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

21234132425 is a deficient number, since it is larger than the sum of its proper divisors (7547150455).

21234132425 is a wasteful number, since it uses less digits than its factorization.

21234132425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 154033 (or 154028 counting only the distinct ones).

The product of its digits is 11520, while the sum is 29.

Adding to 21234132425 its reverse (52423143212), we get a palindrome (73657275637).

The spelling of 21234132425 in words is "twenty-one billion, two hundred thirty-four million, one hundred thirty-two thousand, four hundred twenty-five".