21442023414509 has 2 divisors, whose sum is σ = 21442023414510. Its totient is φ = 21442023414508.

The previous prime is 21442023414499. The next prime is 21442023414517. The reversal of 21442023414509 is 90541432024412.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11306574375625 + 10135449038884 = 3362525^2 + 3183622^2 .

It is a cyclic number.

It is not a de Polignac number, because 21442023414509 - 2¹⁶ = 21442023348973 is a prime.

It is a super-2 number, since 2×21442023414509² (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 (21442023414529) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10721011707254 + 10721011707255.

It is an arithmetic number, because the mean of its divisors is an integer number (10721011707255).

Almost surely, 2^{21442023414509} is an apocalyptic number.

It is an amenable number.

21442023414509 is a deficient number, since it is larger than the sum of its proper divisors (1).

21442023414509 is an equidigital number, since it uses as much as digits as its factorization.

21442023414509 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 276480, while the sum is 41.

The spelling of 21442023414509 in words is "twenty-one trillion, four hundred forty-two billion, twenty-three million, four hundred fourteen thousand, five hundred nine".