20329993919 has 2 divisors, whose sum is σ = 20329993920. Its totient is φ = 20329993918.

The previous prime is 20329993909. The next prime is 20329993991. The reversal of 20329993919 is 91939992302.

Together with next prime (20329993991) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20329993919 is a prime.

It is a super-2 number, since 2×20329993919² (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 (20329993909) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10164996959 + 10164996960.

It is an arithmetic number, because the mean of its divisors is an integer number (10164996960).

Almost surely, 2^20329993919 is an apocalyptic number.

20329993919 is a deficient number, since it is larger than the sum of its proper divisors (1).

20329993919 is an equidigital number, since it uses as much as digits as its factorization.

20329993919 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2125764, while the sum is 56.

The spelling of 20329993919 in words is "twenty billion, three hundred twenty-nine million, nine hundred ninety-three thousand, nine hundred nineteen".