18748749678 has 8 divisors (see below), whose sum is σ = 37497499368. Its totient is φ = 6249583224.

The previous prime is 18748749671. The next prime is 18748749689. The reversal of 18748749678 is 87694784781.

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

18748749678 is an admirable number.

It is a super-2 number, since 2×18748749678² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18748749671) 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 3 ways as a sum of consecutive naturals, for example, 1562395801 + ... + 1562395812.

It is an arithmetic number, because the mean of its divisors is an integer number (4687187421).

Almost surely, 2^18748749678 is an apocalyptic number.

18748749678 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18748749678 is a wasteful number, since it uses less digits than its factorization.

18748749678 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3124791618.

The product of its digits is 151732224, while the sum is 69.

The spelling of 18748749678 in words is "eighteen billion, seven hundred forty-eight million, seven hundred forty-nine thousand, six hundred seventy-eight".