19172039027 has 2 divisors, whose sum is σ = 19172039028. Its totient is φ = 19172039026.

The previous prime is 19172039023. The next prime is 19172039071. The reversal of 19172039027 is 72093027191.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 19172039027 - 2² = 19172039023 is a prime.

It is a super-2 number, since 2×19172039027² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (19172039023) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9586019513 + 9586019514.

It is an arithmetic number, because the mean of its divisors is an integer number (9586019514).

Almost surely, 2^19172039027 is an apocalyptic number.

19172039027 is a deficient number, since it is larger than the sum of its proper divisors (1).

19172039027 is an equidigital number, since it uses as much as digits as its factorization.

19172039027 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 47628, while the sum is 41.

The spelling of 19172039027 in words is "nineteen billion, one hundred seventy-two million, thirty-nine thousand, twenty-seven".