19099989839 has 6 divisors (see below), whose sum is σ = 22218355584. Its totient is φ = 16371419820.

The previous prime is 19099989833. The next prime is 19099989841. The reversal of 19099989839 is 93898999091.

It is not a de Polignac number, because 19099989839 - 2²⁸ = 18831554383 is a prime.

It is a super-2 number, since 2×19099989839² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19099989833) 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, 194897807 + ... + 194897904.

It is an arithmetic number, because the mean of its divisors is an integer number (3703059264).

Almost surely, 2^19099989839 is an apocalyptic number.

19099989839 is a deficient number, since it is larger than the sum of its proper divisors (3118365745).

19099989839 is an equidigital number, since it uses as much as digits as its factorization.

19099989839 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 389795725 (or 389795718 counting only the distinct ones).

The product of its (nonzero) digits is 102036672, while the sum is 74.

The spelling of 19099989839 in words is "nineteen billion, ninety-nine million, nine hundred eighty-nine thousand, eight hundred thirty-nine".