19803138093 has 16 divisors (see below), whose sum is σ = 29346923200. Its totient is φ = 13198068720.

The previous prime is 19803138059. The next prime is 19803138101. The reversal of 19803138093 is 39083130891.

It is a happy number.

It is not a de Polignac number, because 19803138093 - 2¹² = 19803133997 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19803138893) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20158 + ... + 200031.

It is an arithmetic number, because the mean of its divisors is an integer number (1834182700).

Almost surely, 2^19803138093 is an apocalyptic number.

It is an amenable number.

19803138093 is a deficient number, since it is larger than the sum of its proper divisors (9543785107).

19803138093 is a wasteful number, since it uses less digits than its factorization.

19803138093 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 223529 (or 223523 counting only the distinct ones).

The product of its (nonzero) digits is 139968, while the sum is 45.

The spelling of 19803138093 in words is "nineteen billion, eight hundred three million, one hundred thirty-eight thousand, ninety-three".