19269821227 has 2 divisors, whose sum is σ = 19269821228. Its totient is φ = 19269821226.

The previous prime is 19269821119. The next prime is 19269821257. The reversal of 19269821227 is 72212896291.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 19269821227 - 2¹⁵ = 19269788459 is a prime.

It is not a weakly prime, because it can be changed into another prime (19269821257) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9634910613 + 9634910614.

It is an arithmetic number, because the mean of its divisors is an integer number (9634910614).

Almost surely, 2^19269821227 is an apocalyptic number.

19269821227 is a deficient number, since it is larger than the sum of its proper divisors (1).

19269821227 is an equidigital number, since it uses as much as digits as its factorization.

19269821227 is an evil number, because the sum of its binary digits is even.

The product of its digits is 435456, while the sum is 49.

The spelling of 19269821227 in words is "nineteen billion, two hundred sixty-nine million, eight hundred twenty-one thousand, two hundred twenty-seven".