20055404354239 has 2 divisors, whose sum is σ = 20055404354240. Its totient is φ = 20055404354238.

The previous prime is 20055404354233. The next prime is 20055404354261. The reversal of 20055404354239 is 93245340455002.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20055404354239 - 2³³ = 20046814419647 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20055404354233) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10027702177119 + 10027702177120.

It is an arithmetic number, because the mean of its divisors is an integer number (10027702177120).

Almost surely, 2^{20055404354239} is an apocalyptic number.

20055404354239 is a deficient number, since it is larger than the sum of its proper divisors (1).

20055404354239 is an equidigital number, since it uses as much as digits as its factorization.

20055404354239 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2592000, while the sum is 46.

The spelling of 20055404354239 in words is "twenty trillion, fifty-five billion, four hundred four million, three hundred fifty-four thousand, two hundred thirty-nine".