19009371149 has 2 divisors, whose sum is σ = 19009371150. Its totient is φ = 19009371148.

The previous prime is 19009371137. The next prime is 19009371163. The reversal of 19009371149 is 94117390091.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16836879049 + 2172492100 = 129757^2 + 46610^2 .

It is a cyclic number.

It is not a de Polignac number, because 19009371149 - 2⁴ = 19009371133 is a prime.

It is a super-2 number, since 2×19009371149² (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 (19009371109) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9504685574 + 9504685575.

It is an arithmetic number, because the mean of its divisors is an integer number (9504685575).

Almost surely, 2^19009371149 is an apocalyptic number.

It is an amenable number.

19009371149 is a deficient number, since it is larger than the sum of its proper divisors (1).

19009371149 is an equidigital number, since it uses as much as digits as its factorization.

19009371149 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 61236, while the sum is 44.

The spelling of 19009371149 in words is "nineteen billion, nine million, three hundred seventy-one thousand, one hundred forty-nine".