20506241113 has 2 divisors, whose sum is σ = 20506241114. Its totient is φ = 20506241112.

The previous prime is 20506241099. The next prime is 20506241137. The reversal of 20506241113 is 31114260502.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18573056089 + 1933185024 = 136283^2 + 43968^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20506241113 is a prime.

It is not a weakly prime, because it can be changed into another prime (20506241153) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10253120556 + 10253120557.

It is an arithmetic number, because the mean of its divisors is an integer number (10253120557).

Almost surely, 2^20506241113 is an apocalyptic number.

It is an amenable number.

20506241113 is a deficient number, since it is larger than the sum of its proper divisors (1).

20506241113 is an equidigital number, since it uses as much as digits as its factorization.

20506241113 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1440, while the sum is 25.

The spelling of 20506241113 in words is "twenty billion, five hundred six million, two hundred forty-one thousand, one hundred thirteen".