21422315939 has 2 divisors, whose sum is σ = 21422315940. Its totient is φ = 21422315938.

The previous prime is 21422315933. The next prime is 21422315977. The reversal of 21422315939 is 93951322412.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21422315939 - 2⁴ = 21422315923 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21422315896 and 21422315905.

It is not a weakly prime, because it can be changed into another prime (21422315933) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10711157969 + 10711157970.

It is an arithmetic number, because the mean of its divisors is an integer number (10711157970).

Almost surely, 2^21422315939 is an apocalyptic number.

21422315939 is a deficient number, since it is larger than the sum of its proper divisors (1).

21422315939 is an equidigital number, since it uses as much as digits as its factorization.

21422315939 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 116640, while the sum is 41.

The spelling of 21422315939 in words is "twenty-one billion, four hundred twenty-two million, three hundred fifteen thousand, nine hundred thirty-nine".