21625652753 has 2 divisors, whose sum is σ = 21625652754. Its totient is φ = 21625652752.

The previous prime is 21625652677. The next prime is 21625652777. The reversal of 21625652753 is 35725652612.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11144602624 + 10481050129 = 105568^2 + 102377^2 .

It is a cyclic number.

It is not a de Polignac number, because 21625652753 - 2³² = 17330685457 is a prime.

It is not a weakly prime, because it can be changed into another prime (21625652053) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10812826376 + 10812826377.

It is an arithmetic number, because the mean of its divisors is an integer number (10812826377).

Almost surely, 2^21625652753 is an apocalyptic number.

It is an amenable number.

21625652753 is a deficient number, since it is larger than the sum of its proper divisors (1).

21625652753 is an equidigital number, since it uses as much as digits as its factorization.

21625652753 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 756000, while the sum is 44.

The spelling of 21625652753 in words is "twenty-one billion, six hundred twenty-five million, six hundred fifty-two thousand, seven hundred fifty-three".