20323386739 has 2 divisors, whose sum is σ = 20323386740. Its totient is φ = 20323386738.

The previous prime is 20323386697. The next prime is 20323386773. The reversal of 20323386739 is 93768332302.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20323386739 is a prime.

It is a super-2 number, since 2×20323386739² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (20323380739) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10161693369 + 10161693370.

It is an arithmetic number, because the mean of its divisors is an integer number (10161693370).

Almost surely, 2^20323386739 is an apocalyptic number.

20323386739 is a deficient number, since it is larger than the sum of its proper divisors (1).

20323386739 is an equidigital number, since it uses as much as digits as its factorization.

20323386739 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 979776, while the sum is 46.

The spelling of 20323386739 in words is "twenty billion, three hundred twenty-three million, three hundred eighty-six thousand, seven hundred thirty-nine".