21325512425 has 12 divisors (see below), whose sum is σ = 30221297856. Its totient is φ = 14623208400.

The previous prime is 21325512389. The next prime is 21325512433. The reversal of 21325512425 is 52421552312.

It is not a de Polignac number, because 21325512425 - 2⁶ = 21325512361 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21325512391 and 21325512400.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 60929861 + ... + 60930210.

It is an arithmetic number, because the mean of its divisors is an integer number (2518441488).

Almost surely, 2^21325512425 is an apocalyptic number.

21325512425 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

21325512425 is a deficient number, since it is larger than the sum of its proper divisors (8895785431).

21325512425 is a wasteful number, since it uses less digits than its factorization.

21325512425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 121860088 (or 121860083 counting only the distinct ones).

The product of its digits is 24000, while the sum is 32.

The spelling of 21325512425 in words is "twenty-one billion, three hundred twenty-five million, five hundred twelve thousand, four hundred twenty-five".