20418364061 has 2 divisors, whose sum is σ = 20418364062. Its totient is φ = 20418364060.

The previous prime is 20418364033. The next prime is 20418364081. The reversal of 20418364061 is 16046381402.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14569938436 + 5848425625 = 120706^2 + 76475^2 .

It is a cyclic number.

It is not a de Polignac number, because 20418364061 - 2⁶ = 20418363997 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20418364081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10209182030 + 10209182031.

It is an arithmetic number, because the mean of its divisors is an integer number (10209182031).

Almost surely, 2^20418364061 is an apocalyptic number.

It is an amenable number.

20418364061 is a deficient number, since it is larger than the sum of its proper divisors (1).

20418364061 is an equidigital number, since it uses as much as digits as its factorization.

20418364061 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 27648, while the sum is 35.

The spelling of 20418364061 in words is "twenty billion, four hundred eighteen million, three hundred sixty-four thousand, sixty-one".