21320032319 has 2 divisors, whose sum is σ = 21320032320. Its totient is φ = 21320032318.

The previous prime is 21320032211. The next prime is 21320032339. The reversal of 21320032319 is 91323002312.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21320032319 is a prime.

It is a super-2 number, since 2×21320032319² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21320032339) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10660016159 + 10660016160.

It is an arithmetic number, because the mean of its divisors is an integer number (10660016160).

Almost surely, 2^21320032319 is an apocalyptic number.

21320032319 is a deficient number, since it is larger than the sum of its proper divisors (1).

21320032319 is an equidigital number, since it uses as much as digits as its factorization.

21320032319 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1944, while the sum is 26.

The spelling of 21320032319 in words is "twenty-one billion, three hundred twenty million, thirty-two thousand, three hundred nineteen".