19106574997 has 2 divisors, whose sum is σ = 19106574998. Its totient is φ = 19106574996.

The previous prime is 19106574989. The next prime is 19106575039. The reversal of 19106574997 is 79947560191.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19040136196 + 66438801 = 137986^2 + 8151^2 .

It is a cyclic number.

It is not a de Polignac number, because 19106574997 - 2³ = 19106574989 is a prime.

It is a super-2 number, since 2×19106574997² (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 (19106574797) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9553287498 + 9553287499.

It is an arithmetic number, because the mean of its divisors is an integer number (9553287499).

Almost surely, 2^19106574997 is an apocalyptic number.

It is an amenable number.

19106574997 is a deficient number, since it is larger than the sum of its proper divisors (1).

19106574997 is an equidigital number, since it uses as much as digits as its factorization.

19106574997 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4286520, while the sum is 58.

The spelling of 19106574997 in words is "nineteen billion, one hundred six million, five hundred seventy-four thousand, nine hundred ninety-seven".