20734208239 has 2 divisors, whose sum is σ = 20734208240. Its totient is φ = 20734208238.

The previous prime is 20734208207. The next prime is 20734208251. The reversal of 20734208239 is 93280243702.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20734208239 - 2⁵ = 20734208207 is a prime.

It is a super-2 number, since 2×20734208239² (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 (20734208639) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10367104119 + 10367104120.

It is an arithmetic number, because the mean of its divisors is an integer number (10367104120).

Almost surely, 2^20734208239 is an apocalyptic number.

20734208239 is a deficient number, since it is larger than the sum of its proper divisors (1).

20734208239 is an equidigital number, since it uses as much as digits as its factorization.

20734208239 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 145152, while the sum is 40.

The spelling of 20734208239 in words is "twenty billion, seven hundred thirty-four million, two hundred eight thousand, two hundred thirty-nine".