19009239001 has 2 divisors, whose sum is σ = 19009239002. Its totient is φ = 19009239000.

The previous prime is 19009238999. The next prime is 19009239023. The reversal of 19009239001 is 10093290091.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12984374601 + 6024864400 = 113949^2 + 77620^2 .

It is a cyclic number.

It is not a de Polignac number, because 19009239001 - 2¹ = 19009238999 is a prime.

It is a super-2 number, since 2×19009239001² (a number of 21 digits) contains 22 as substring.

Together with 19009238999, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (19009239901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9504619500 + 9504619501.

It is an arithmetic number, because the mean of its divisors is an integer number (9504619501).

Almost surely, 2^19009239001 is an apocalyptic number.

It is an amenable number.

19009239001 is a deficient number, since it is larger than the sum of its proper divisors (1).

19009239001 is an equidigital number, since it uses as much as digits as its factorization.

19009239001 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4374, while the sum is 34.

It can be divided in two parts, 1900923 and 9001, that added together give a square (1909924 = 1382²).

The spelling of 19009239001 in words is "nineteen billion, nine million, two hundred thirty-nine thousand, one".