18227320402 has 16 divisors (see below), whose sum is σ = 27428909760. Its totient is φ = 9084387312.

The previous prime is 18227320367. The next prime is 18227320403. The reversal of 18227320402 is 20402372281.

It is not an unprimeable number, because it can be changed into a prime (18227320403) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1083568 + ... + 1100260.

It is an arithmetic number, because the mean of its divisors is an integer number (1714306860).

Almost surely, 2^18227320402 is an apocalyptic number.

18227320402 is a deficient number, since it is larger than the sum of its proper divisors (9201589358).

18227320402 is a wasteful number, since it uses less digits than its factorization.

18227320402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18417.

The product of its (nonzero) digits is 10752, while the sum is 31.

Adding to 18227320402 its reverse (20402372281), we get a palindrome (38629692683).

The spelling of 18227320402 in words is "eighteen billion, two hundred twenty-seven million, three hundred twenty thousand, four hundred two".