20402200193 has 2 divisors, whose sum is σ = 20402200194. Its totient is φ = 20402200192.

The previous prime is 20402200187. The next prime is 20402200207. The reversal of 20402200193 is 39100220402.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 14983473649 + 5418726544 = 122407^2 + 73612^2 .

It is a cyclic number.

It is not a de Polignac number, because 20402200193 - 2²² = 20398005889 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (20402203193) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10201100096 + 10201100097.

It is an arithmetic number, because the mean of its divisors is an integer number (10201100097).

Almost surely, 2^20402200193 is an apocalyptic number.

It is an amenable number.

20402200193 is a deficient number, since it is larger than the sum of its proper divisors (1).

20402200193 is an equidigital number, since it uses as much as digits as its factorization.

20402200193 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 864, while the sum is 23.

Adding to 20402200193 its reverse (39100220402), we get a palindrome (59502420595).

The spelling of 20402200193 in words is "twenty billion, four hundred two million, two hundred thousand, one hundred ninety-three".