19901583253 has 2 divisors, whose sum is σ = 19901583254. Its totient is φ = 19901583252.

The previous prime is 19901583211. The next prime is 19901583257. The reversal of 19901583253 is 35238510991.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19890307089 + 11276164 = 141033^2 + 3358^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-19901583253 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19901583257) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9950791626 + 9950791627.

It is an arithmetic number, because the mean of its divisors is an integer number (9950791627).

Almost surely, 2^19901583253 is an apocalyptic number.

It is an amenable number.

19901583253 is a deficient number, since it is larger than the sum of its proper divisors (1).

19901583253 is an equidigital number, since it uses as much as digits as its factorization.

19901583253 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 291600, while the sum is 46.

The spelling of 19901583253 in words is "nineteen billion, nine hundred one million, five hundred eighty-three thousand, two hundred fifty-three".