19228656731 has 2 divisors, whose sum is σ = 19228656732. Its totient is φ = 19228656730.

The previous prime is 19228656703. The next prime is 19228656743. The reversal of 19228656731 is 13765682291.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 19228656731 - 2³⁴ = 2048787547 is a prime.

It is a super-2 number, since 2×19228656731² (a number of 21 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a self number, because there is not a number n which added to its sum of digits gives 19228656731.

It is not a weakly prime, because it can be changed into another prime (19228656791) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9614328365 + 9614328366.

It is an arithmetic number, because the mean of its divisors is an integer number (9614328366).

Almost surely, 2^19228656731 is an apocalyptic number.

19228656731 is a deficient number, since it is larger than the sum of its proper divisors (1).

19228656731 is an equidigital number, since it uses as much as digits as its factorization.

19228656731 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1088640, while the sum is 50.

The spelling of 19228656731 in words is "nineteen billion, two hundred twenty-eight million, six hundred fifty-six thousand, seven hundred thirty-one".