21150023044939 has 2 divisors, whose sum is σ = 21150023044940. Its totient is φ = 21150023044938.

The previous prime is 21150023044919. The next prime is 21150023044957. The reversal of 21150023044939 is 93944032005112.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21150023044939 - 2²⁵ = 21149989490507 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21150023044895 and 21150023044904.

It is not a weakly prime, because it can be changed into another prime (21150023044919) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10575011522469 + 10575011522470.

It is an arithmetic number, because the mean of its divisors is an integer number (10575011522470).

Almost surely, 2^{21150023044939} is an apocalyptic number.

21150023044939 is a deficient number, since it is larger than the sum of its proper divisors (1).

21150023044939 is an equidigital number, since it uses as much as digits as its factorization.

21150023044939 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 233280, while the sum is 43.

The spelling of 21150023044939 in words is "twenty-one trillion, one hundred fifty billion, twenty-three million, forty-four thousand, nine hundred thirty-nine".