21574533373 has 2 divisors, whose sum is σ = 21574533374. Its totient is φ = 21574533372.

The previous prime is 21574533311. The next prime is 21574533443. The reversal of 21574533373 is 37333547512.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17832397444 + 3742135929 = 133538^2 + 61173^2 .

It is a cyclic number.

It is not a de Polignac number, because 21574533373 - 2¹⁷ = 21574402301 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21574531373) 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 as a sum of consecutive naturals, namely, 10787266686 + 10787266687.

It is an arithmetic number, because the mean of its divisors is an integer number (10787266687).

Almost surely, 2^21574533373 is an apocalyptic number.

It is an amenable number.

21574533373 is a deficient number, since it is larger than the sum of its proper divisors (1).

21574533373 is an equidigital number, since it uses as much as digits as its factorization.

21574533373 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 793800, while the sum is 43.

The spelling of 21574533373 in words is "twenty-one billion, five hundred seventy-four million, five hundred thirty-three thousand, three hundred seventy-three".