16820383718 has 4 divisors (see below), whose sum is σ = 25230575580. Its totient is φ = 8410191858.

The previous prime is 16820383717. The next prime is 16820383751. The reversal of 16820383718 is 81738302861.

It is a happy number.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16820383717) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4205095928 + ... + 4205095931.

It is an arithmetic number, because the mean of its divisors is an integer number (6307643895).

Almost surely, 2^16820383718 is an apocalyptic number.

16820383718 is a deficient number, since it is larger than the sum of its proper divisors (8410191862).

16820383718 is an equidigital number, since it uses as much as digits as its factorization.

16820383718 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8410191861.

The product of its (nonzero) digits is 387072, while the sum is 47.

The spelling of 16820383718 in words is "sixteen billion, eight hundred twenty million, three hundred eighty-three thousand, seven hundred eighteen".