21430013403825 has 144 divisors (see below), whose sum is σ = 41498856986496. Its totient is φ = 10508685465600.

The previous prime is 21430013403803. The next prime is 21430013403857. The reversal of 21430013403825 is 52830431003412.

21430013403825 is a `hidden beast` number, since 2 + 1 + 4 + 300 + 1 + 340 + 3 + 8 + 2 + 5 = 666.

It is not a de Polignac number, because 21430013403825 - 2⁵ = 21430013403793 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 21430013403825.

It is an unprimeable number.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 1075416012 + ... + 1075435938.

Almost surely, 2^{21430013403825} is an apocalyptic number.

21430013403825 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

21430013403825 is a deficient number, since it is larger than the sum of its proper divisors (20068843582671).

21430013403825 is a wasteful number, since it uses less digits than its factorization.

21430013403825 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21384 (or 21376 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 36.

The spelling of 21430013403825 in words is "twenty-one trillion, four hundred thirty billion, thirteen million, four hundred three thousand, eight hundred twenty-five".