20402200243 has 8 divisors (see below), whose sum is σ = 20698821216. Its totient is φ = 20105836800.

The previous prime is 20402200237. The next prime is 20402200261. The reversal of 20402200243 is 34200220402.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 20402200243 - 2⁵ = 20402200211 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20402200243.

It is not an unprimeable number, because it can be changed into a prime (20402200213) 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, 98173 + ... + 224593.

It is an arithmetic number, because the mean of its divisors is an integer number (2587352652).

Almost surely, 2^20402200243 is an apocalyptic number.

20402200243 is a deficient number, since it is larger than the sum of its proper divisors (296620973).

20402200243 is a wasteful number, since it uses less digits than its factorization.

20402200243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128765.

The product of its (nonzero) digits is 768, while the sum is 19.

Adding to 20402200243 its reverse (34200220402), we get a palindrome (54602420645).

The spelling of 20402200243 in words is "twenty billion, four hundred two million, two hundred thousand, two hundred forty-three".