21402104625 has 96 divisors (see below), whose sum is σ = 42306675840. Its totient is φ = 10322928000.

The previous prime is 21402104611. The next prime is 21402104639. The reversal of 21402104625 is 52640120412.

21402104625 is a `hidden beast` number, since 2 + 14 + 0 + 21 + 0 + 4 + 625 = 666.

It is an interprime number because it is at equal distance from previous prime (21402104611) and next prime (21402104639).

It is not a de Polignac number, because 21402104625 - 2⁷ = 21402104497 is a prime.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 2433486 + ... + 2442264.

It is an arithmetic number, because the mean of its divisors is an integer number (440694540).

Almost surely, 2^21402104625 is an apocalyptic number.

21402104625 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

21402104625 is a deficient number, since it is larger than the sum of its proper divisors (20904571215).

21402104625 is a wasteful number, since it uses less digits than its factorization.

21402104625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9008 (or 8995 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 27.

The spelling of 21402104625 in words is "twenty-one billion, four hundred two million, one hundred four thousand, six hundred twenty-five".