19005321253 has 2 divisors, whose sum is σ = 19005321254. Its totient is φ = 19005321252.

The previous prime is 19005321233. The next prime is 19005321271. The reversal of 19005321253 is 35212350091.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18117698404 + 887622849 = 134602^2 + 29793^2 .

It is a cyclic number.

It is not a de Polignac number, because 19005321253 - 2²¹ = 19003224101 is a prime.

It is a super-2 number, since 2×19005321253² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19005321233) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9502660626 + 9502660627.

It is an arithmetic number, because the mean of its divisors is an integer number (9502660627).

Almost surely, 2^19005321253 is an apocalyptic number.

It is an amenable number.

19005321253 is a deficient number, since it is larger than the sum of its proper divisors (1).

19005321253 is an equidigital number, since it uses as much as digits as its factorization.

19005321253 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8100, while the sum is 31.

The spelling of 19005321253 in words is "nineteen billion, five million, three hundred twenty-one thousand, two hundred fifty-three".