21890802288659 has 2 divisors, whose sum is σ = 21890802288660. Its totient is φ = 21890802288658.

The previous prime is 21890802288653. The next prime is 21890802288661. The reversal of 21890802288659 is 95688220809812.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21890802288659 - 2⁴ = 21890802288643 is a prime.

It is a super-2 number, since 2×21890802288659² (a number of 27 digits) contains 22 as substring.

Together with 21890802288661, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (21890802288653) 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, 10945401144329 + 10945401144330.

It is an arithmetic number, because the mean of its divisors is an integer number (10945401144330).

Almost surely, 2^{21890802288659} is an apocalyptic number.

21890802288659 is a deficient number, since it is larger than the sum of its proper divisors (1).

21890802288659 is an equidigital number, since it uses as much as digits as its factorization.

21890802288659 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 79626240, while the sum is 68.

The spelling of 21890802288659 in words is "twenty-one trillion, eight hundred ninety billion, eight hundred two million, two hundred eighty-eight thousand, six hundred fifty-nine".