19835580133 has 4 divisors (see below), whose sum is σ = 19836738220. Its totient is φ = 19834422048.

The previous prime is 19835580131. The next prime is 19835580139. The reversal of 19835580133 is 33108553891.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 33108553891 = 7 ⋅4729793413.

It can be written as a sum of positive squares in 2 ways, for example, as 7028810244 + 12806769889 = 83838^2 + 113167^2 .

It is a cyclic number.

It is not a de Polignac number, because 19835580133 - 2¹ = 19835580131 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 (19835580131) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 552960 + ... + 587737.

It is an arithmetic number, because the mean of its divisors is an integer number (4959184555).

Almost surely, 2^19835580133 is an apocalyptic number.

It is an amenable number.

19835580133 is a deficient number, since it is larger than the sum of its proper divisors (1158087).

19835580133 is a wasteful number, since it uses less digits than its factorization.

19835580133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1158086.

The product of its (nonzero) digits is 388800, while the sum is 46.

The spelling of 19835580133 in words is "nineteen billion, eight hundred thirty-five million, five hundred eighty thousand, one hundred thirty-three".