20115574886839 has 2 divisors, whose sum is σ = 20115574886840. Its totient is φ = 20115574886838.

The previous prime is 20115574886837. The next prime is 20115574886843. The reversal of 20115574886839 is 93868847551102.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20115574886839 - 2¹ = 20115574886837 is a prime.

Together with 20115574886837, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20115574886837) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10057787443419 + 10057787443420.

It is an arithmetic number, because the mean of its divisors is an integer number (10057787443420).

It is a 1-persistent number, because it is pandigital, but 2⋅20115574886839 = 40231149773678 is not.

Almost surely, 2^{20115574886839} is an apocalyptic number.

20115574886839 is a deficient number, since it is larger than the sum of its proper divisors (1).

20115574886839 is an equidigital number, since it uses as much as digits as its factorization.

20115574886839 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 116121600, while the sum is 67.

The spelling of 20115574886839 in words is "twenty trillion, one hundred fifteen billion, five hundred seventy-four million, eight hundred eighty-six thousand, eight hundred thirty-nine".