19900990301 has 2 divisors, whose sum is σ = 19900990302. Its totient is φ = 19900990300.

The previous prime is 19900990289. The next prime is 19900990309. The reversal of 19900990301 is 10309900991.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11302879225 + 8598111076 = 106315^2 + 92726^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-19900990301 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19900990309) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9950495150 + 9950495151.

It is an arithmetic number, because the mean of its divisors is an integer number (9950495151).

Almost surely, 2^19900990301 is an apocalyptic number.

It is an amenable number.

19900990301 is a deficient number, since it is larger than the sum of its proper divisors (1).

19900990301 is an equidigital number, since it uses as much as digits as its factorization.

19900990301 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 19683, while the sum is 41.

The spelling of 19900990301 in words is "nineteen billion, nine hundred million, nine hundred ninety thousand, three hundred one".