18721472751346 has 16 divisors (see below), whose sum is σ = 28559394226080. Its totient is φ = 9202243770720.

The previous prime is 18721472751307. The next prime is 18721472751347. The reversal of 18721472751346 is 64315727412781.

It is not an unprimeable number, because it can be changed into a prime (18721472751347) 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, 142207611 + ... + 142339198.

It is an arithmetic number, because the mean of its divisors is an integer number (1784962139130).

Almost surely, 2^{18721472751346} is an apocalyptic number.

18721472751346 is a deficient number, since it is larger than the sum of its proper divisors (9837921474734).

18721472751346 is a wasteful number, since it uses less digits than its factorization.

18721472751346 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 284547369.

The product of its digits is 15805440, while the sum is 58.

The spelling of 18721472751346 in words is "eighteen trillion, seven hundred twenty-one billion, four hundred seventy-two million, seven hundred fifty-one thousand, three hundred forty-six".