20311100204839 has 2 divisors, whose sum is σ = 20311100204840. Its totient is φ = 20311100204838.

The previous prime is 20311100204741. The next prime is 20311100204861. The reversal of 20311100204839 is 93840200111302.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20311100204839 - 2³¹ = 20308952721191 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20311100204869) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10155550102419 + 10155550102420.

It is an arithmetic number, because the mean of its divisors is an integer number (10155550102420).

Almost surely, 2^{20311100204839} is an apocalyptic number.

20311100204839 is a deficient number, since it is larger than the sum of its proper divisors (1).

20311100204839 is an equidigital number, since it uses as much as digits as its factorization.

20311100204839 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10368, while the sum is 34.

The spelling of 20311100204839 in words is "twenty trillion, three hundred eleven billion, one hundred million, two hundred four thousand, eight hundred thirty-nine".