19848270138 has 16 divisors (see below), whose sum is σ = 39738206016. Its totient is φ = 6609145760.

The previous prime is 19848270017. The next prime is 19848270157. The reversal of 19848270138 is 83107284891.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1729878 + ... + 1741313.

It is an arithmetic number, because the mean of its divisors is an integer number (2483637876).

Almost surely, 2^19848270138 is an apocalyptic number.

19848270138 is an abundant number, since it is smaller than the sum of its proper divisors (19889935878).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

19848270138 is a wasteful number, since it uses less digits than its factorization.

19848270138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3472149.

The product of its (nonzero) digits is 774144, while the sum is 51.

The spelling of 19848270138 in words is "nineteen billion, eight hundred forty-eight million, two hundred seventy thousand, one hundred thirty-eight".