20893896139 has 2 divisors, whose sum is σ = 20893896140. Its totient is φ = 20893896138.

The previous prime is 20893896083. The next prime is 20893896151. The reversal of 20893896139 is 93169839802.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20893896139 - 2¹⁵ = 20893863371 is a prime.

It is not a weakly prime, because it can be changed into another prime (20893806139) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10446948069 + 10446948070.

It is an arithmetic number, because the mean of its divisors is an integer number (10446948070).

Almost surely, 2^20893896139 is an apocalyptic number.

20893896139 is a deficient number, since it is larger than the sum of its proper divisors (1).

20893896139 is an equidigital number, since it uses as much as digits as its factorization.

20893896139 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5038848, while the sum is 58.

The spelling of 20893896139 in words is "twenty billion, eight hundred ninety-three million, eight hundred ninety-six thousand, one hundred thirty-nine".