21322231739 has 2 divisors, whose sum is σ = 21322231740. Its totient is φ = 21322231738.

The previous prime is 21322231687. The next prime is 21322231807. The reversal of 21322231739 is 93713222312.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21322231739 - 2¹² = 21322227643 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21322231699 and 21322231708.

It is not a weakly prime, because it can be changed into another prime (21322131739) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10661115869 + 10661115870.

It is an arithmetic number, because the mean of its divisors is an integer number (10661115870).

Almost surely, 2^21322231739 is an apocalyptic number.

21322231739 is a deficient number, since it is larger than the sum of its proper divisors (1).

21322231739 is an equidigital number, since it uses as much as digits as its factorization.

21322231739 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 27216, while the sum is 35.

The spelling of 21322231739 in words is "twenty-one billion, three hundred twenty-two million, two hundred thirty-one thousand, seven hundred thirty-nine".