21140625253 has 8 divisors (see below), whose sum is σ = 24276316320. Its totient is φ = 18207236880.

The previous prime is 21140625251. The next prime is 21140625269. The reversal of 21140625253 is 35252604112.

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 21140625253 - 2¹ = 21140625251 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21140625251) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 50575450 + ... + 50575867.

It is an arithmetic number, because the mean of its divisors is an integer number (3034539540).

Almost surely, 2^21140625253 is an apocalyptic number.

It is an amenable number.

21140625253 is a deficient number, since it is larger than the sum of its proper divisors (3135691067).

21140625253 is a wasteful number, since it uses less digits than its factorization.

21140625253 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101151347.

The product of its (nonzero) digits is 14400, while the sum is 31.

The spelling of 21140625253 in words is "twenty-one billion, one hundred forty million, six hundred twenty-five thousand, two hundred fifty-three".