18939827704 has 144 divisors (see below), whose sum is σ = 45307010880. Its totient is φ = 7391784960.

The previous prime is 18939827689. The next prime is 18939827707. The reversal of 18939827704 is 40772893981.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18939827707) 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 35 ways as a sum of consecutive naturals, for example, 3509232 + ... + 3514624.

It is an arithmetic number, because the mean of its divisors is an integer number (314632020).

Almost surely, 2^18939827704 is an apocalyptic number.

18939827704 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18939827704, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22653505440).

18939827704 is an abundant number, since it is smaller than the sum of its proper divisors (26367183176).

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

18939827704 is a wasteful number, since it uses less digits than its factorization.

18939827704 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5478 (or 5450 counting only the distinct ones).

The product of its (nonzero) digits is 6096384, while the sum is 58.

The spelling of 18939827704 in words is "eighteen billion, nine hundred thirty-nine million, eight hundred twenty-seven thousand, seven hundred four".