20183718340 has 24 divisors (see below), whose sum is σ = 42389188632. Its totient is φ = 8072843520.

The previous prime is 20183718319. The next prime is 20183718349. The reversal of 20183718340 is 4381738102.

It can be written as a sum of positive squares in 4 ways, for example, as 8189526016 + 11994192324 = 90496^2 + 109518^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 20183718340.

It is not an unprimeable number, because it can be changed into a prime (20183718349) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 278352 + ... + 343288.

It is an arithmetic number, because the mean of its divisors is an integer number (1766216193).

Almost surely, 2^20183718340 is an apocalyptic number.

20183718340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20183718340 is an abundant number, since it is smaller than the sum of its proper divisors (22205470292).

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

20183718340 is a wasteful number, since it uses less digits than its factorization.

20183718340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80487 (or 80485 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 37.

The spelling of 20183718340 in words is "twenty billion, one hundred eighty-three million, seven hundred eighteen thousand, three hundred forty".