21580800023 has 2 divisors, whose sum is σ = 21580800024. Its totient is φ = 21580800022.

The previous prime is 21580799951. The next prime is 21580800047. The reversal of 21580800023 is 32000808512.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21580800023 - 2¹² = 21580795927 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21580800323) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10790400011 + 10790400012.

It is an arithmetic number, because the mean of its divisors is an integer number (10790400012).

Almost surely, 2^21580800023 is an apocalyptic number.

21580800023 is a deficient number, since it is larger than the sum of its proper divisors (1).

21580800023 is an equidigital number, since it uses as much as digits as its factorization.

21580800023 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3840, while the sum is 29.

The spelling of 21580800023 in words is "twenty-one billion, five hundred eighty million, eight hundred thousand, twenty-three".