21625624133 has 16 divisors (see below), whose sum is σ = 22640256000. Its totient is φ = 20630406720.

The previous prime is 21625624123. The next prime is 21625624147. The reversal of 21625624133 is 33142652612.

It is a cyclic number.

It is not a de Polignac number, because 21625624133 - 2¹⁶ = 21625558597 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21625624093 and 21625624102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21625624123) 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 15 ways as a sum of consecutive naturals, for example, 812210 + ... + 838412.

It is an arithmetic number, because the mean of its divisors is an integer number (1415016000).

Almost surely, 2^21625624133 is an apocalyptic number.

It is an amenable number.

21625624133 is a deficient number, since it is larger than the sum of its proper divisors (1014631867).

21625624133 is a wasteful number, since it uses less digits than its factorization.

21625624133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26572.

The product of its digits is 51840, while the sum is 35.

The spelling of 21625624133 in words is "twenty-one billion, six hundred twenty-five million, six hundred twenty-four thousand, one hundred thirty-three".