20013855276697 has 2 divisors, whose sum is σ = 20013855276698. Its totient is φ = 20013855276696.

The previous prime is 20013855276671. The next prime is 20013855276713. The reversal of 20013855276697 is 79667255831002.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12724173873216 + 7289681403481 = 3567096^2 + 2699941^2 .

It is a cyclic number.

It is not a de Polignac number, because 20013855276697 - 2³⁹ = 19464099462809 is a prime.

It is not a weakly prime, because it can be changed into another prime (20013355276697) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10006927638348 + 10006927638349.

It is an arithmetic number, because the mean of its divisors is an integer number (10006927638349).

Almost surely, 2^{20013855276697} is an apocalyptic number.

It is an amenable number.

20013855276697 is a deficient number, since it is larger than the sum of its proper divisors (1).

20013855276697 is an equidigital number, since it uses as much as digits as its factorization.

20013855276697 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 38102400, while the sum is 61.

The spelling of 20013855276697 in words is "twenty trillion, thirteen billion, eight hundred fifty-five million, two hundred seventy-six thousand, six hundred ninety-seven".