20188343 has 6 divisors (see below), whose sum is σ = 23484456. Its totient is φ = 17304252.

The previous prime is 20188331. The next prime is 20188361. The reversal of 20188343 is 34388102.

It is a happy number.

It is not a de Polignac number, because 20188343 - 2⁴ = 20188327 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 (20188243) 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, 205955 + ... + 206052.

It is an arithmetic number, because the mean of its divisors is an integer number (3914076).

Almost surely, 2^20188343 is an apocalyptic number.

20188343 is a deficient number, since it is larger than the sum of its proper divisors (3296113).

20188343 is an equidigital number, since it uses as much as digits as its factorization.

20188343 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 412021 (or 412014 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 29.

The square root of 20188343 is about 4493.1439994730. The cubic root of 20188343 is about 272.2911701395.

The spelling of 20188343 in words is "twenty million, one hundred eighty-eight thousand, three hundred forty-three".