21150023044439 has 2 divisors, whose sum is σ = 21150023044440. Its totient is φ = 21150023044438.

The previous prime is 21150023044399. The next prime is 21150023044453. The reversal of 21150023044439 is 93444032005112.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21150023044439 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21150023044939) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10575011522219 + 10575011522220.

It is an arithmetic number, because the mean of its divisors is an integer number (10575011522220).

Almost surely, 2^{21150023044439} is an apocalyptic number.

21150023044439 is a deficient number, since it is larger than the sum of its proper divisors (1).

21150023044439 is an equidigital number, since it uses as much as digits as its factorization.

21150023044439 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 103680, while the sum is 38.

The spelling of 21150023044439 in words is "twenty-one trillion, one hundred fifty billion, twenty-three million, forty-four thousand, four hundred thirty-nine".