19995253 has 2 divisors, whose sum is σ = 19995254. Its totient is φ = 19995252.

The previous prime is 19995169. The next prime is 19995259. The reversal of 19995253 is 35259991.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18164644 + 1830609 = 4262^2 + 1353^2 .

It is a cyclic number.

It is not a de Polignac number, because 19995253 - 2¹⁷ = 19864181 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19995259) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9997626 + 9997627.

It is an arithmetic number, because the mean of its divisors is an integer number (9997627).

Almost surely, 2^19995253 is an apocalyptic number.

It is an amenable number.

19995253 is a deficient number, since it is larger than the sum of its proper divisors (1).

19995253 is an equidigital number, since it uses as much as digits as its factorization.

19995253 is an evil number, because the sum of its binary digits is even.

The product of its digits is 109350, while the sum is 43.

The square root of 19995253 is about 4471.6051927691. The cubic root of 19995253 is about 271.4202843928.

The spelling of 19995253 in words is "nineteen million, nine hundred ninety-five thousand, two hundred fifty-three".