19001328939 has 6 divisors (see below), whose sum is σ = 27446364036. Its totient is φ = 12667552620.

The previous prime is 19001328923. The next prime is 19001328949. The reversal of 19001328939 is 93982310091.

It is a happy number.

It is not a de Polignac number, because 19001328939 - 2⁴ = 19001328923 is a prime.

It is a super-2 number, since 2×19001328939² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 19001328894 and 19001328903.

It is not an unprimeable number, because it can be changed into a prime (19001328949) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1055629377 + ... + 1055629394.

It is an arithmetic number, because the mean of its divisors is an integer number (4574394006).

Almost surely, 2^19001328939 is an apocalyptic number.

19001328939 is a deficient number, since it is larger than the sum of its proper divisors (8445035097).

19001328939 is a wasteful number, since it uses less digits than its factorization.

19001328939 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2111258777 (or 2111258774 counting only the distinct ones).

The product of its (nonzero) digits is 104976, while the sum is 45.

The spelling of 19001328939 in words is "nineteen billion, one million, three hundred twenty-eight thousand, nine hundred thirty-nine".