21310032425 has 24 divisors (see below), whose sum is σ = 28930832832. Its totient is φ = 15442200000.

The previous prime is 21310032397. The next prime is 21310032433. The reversal of 21310032425 is 52423001312.

It is not a de Polignac number, because 21310032425 - 2⁶ = 21310032361 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21310032425.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 63701 + ... + 216050.

It is an arithmetic number, because the mean of its divisors is an integer number (1205451368).

Almost surely, 2^21310032425 is an apocalyptic number.

21310032425 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

21310032425 is a deficient number, since it is larger than the sum of its proper divisors (7620800407).

21310032425 is a wasteful number, since it uses less digits than its factorization.

21310032425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 280049 (or 280044 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 23.

Adding to 21310032425 its reverse (52423001312), we get a palindrome (73733033737).

The spelling of 21310032425 in words is "twenty-one billion, three hundred ten million, thirty-two thousand, four hundred twenty-five".