21423322020719 has 2 divisors, whose sum is σ = 21423322020720. Its totient is φ = 21423322020718.

The previous prime is 21423322020689. The next prime is 21423322020739. The reversal of 21423322020719 is 91702022332412.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21423322020719 - 2¹⁶ = 21423321955183 is a prime.

It is a super-2 number, since 2×21423322020719² (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 (21423322020739) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10711661010359 + 10711661010360.

It is an arithmetic number, because the mean of its divisors is an integer number (10711661010360).

Almost surely, 2^{21423322020719} is an apocalyptic number.

21423322020719 is a deficient number, since it is larger than the sum of its proper divisors (1).

21423322020719 is an equidigital number, since it uses as much as digits as its factorization.

21423322020719 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72576, while the sum is 38.

The spelling of 21423322020719 in words is "twenty-one trillion, four hundred twenty-three billion, three hundred twenty-two million, twenty thousand, seven hundred nineteen".