21463623225 has 72 divisors (see below), whose sum is σ = 43072278912. Its totient is φ = 10125302400.

The previous prime is 21463623217. The next prime is 21463623257. The reversal of 21463623225 is 52232636412.

21463623225 is a `hidden beast` number, since 2 + 1 + 4 + 6 + 3 + 623 + 2 + 25 = 666.

It is not a de Polignac number, because 21463623225 - 2³ = 21463623217 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21463623225.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 25617 + ... + 208766.

It is an arithmetic number, because the mean of its divisors is an integer number (598226096).

Almost surely, 2^21463623225 is an apocalyptic number.

21463623225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

21463623225 is an abundant number, since it is smaller than the sum of its proper divisors (21608655687).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21463623225 is a wasteful number, since it uses less digits than its factorization.

21463623225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 234447 (or 234439 counting only the distinct ones).

The product of its digits is 103680, while the sum is 36.

The spelling of 21463623225 in words is "twenty-one billion, four hundred sixty-three million, six hundred twenty-three thousand, two hundred twenty-five".