18400002202 has 4 divisors (see below), whose sum is σ = 27600003306. Its totient is φ = 9200001100.

The previous prime is 18400002197. The next prime is 18400002217. The reversal of 18400002202 is 20220000481.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 13634999361 + 4765002841 = 116769^2 + 69029^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 18400002202.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4600000549 + ... + 4600000552.

Almost surely, 2^18400002202 is an apocalyptic number.

18400002202 is a deficient number, since it is larger than the sum of its proper divisors (9200001104).

18400002202 is an equidigital number, since it uses as much as digits as its factorization.

18400002202 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9200001103.

The product of its (nonzero) digits is 256, while the sum is 19.

Adding to 18400002202 its reverse (20220000481), we get a palindrome (38620002683).

The spelling of 18400002202 in words is "eighteen billion, four hundred million, two thousand, two hundred two".