21624359251933 has 2 divisors, whose sum is σ = 21624359251934. Its totient is φ = 21624359251932.

The previous prime is 21624359251903. The next prime is 21624359251993. The reversal of 21624359251933 is 33915295342612.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 21373580646649 + 250778605284 = 4623157^2 + 500778^2 .

It is a cyclic number.

It is not a de Polignac number, because 21624359251933 - 2²¹ = 21624357154781 is a prime.

It is a super-2 number, since 2×21624359251933² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21624359251903) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10812179625966 + 10812179625967.

It is an arithmetic number, because the mean of its divisors is an integer number (10812179625967).

Almost surely, 2^{21624359251933} is an apocalyptic number.

It is an amenable number.

21624359251933 is a deficient number, since it is larger than the sum of its proper divisors (1).

21624359251933 is an equidigital number, since it uses as much as digits as its factorization.

21624359251933 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10497600, while the sum is 55.

The spelling of 21624359251933 in words is "twenty-one trillion, six hundred twenty-four billion, three hundred fifty-nine million, two hundred fifty-one thousand, nine hundred thirty-three".