18749016 has 128 divisors (see below), whose sum is σ = 61286400. Its totient is φ = 5235840.

The previous prime is 18749009. The next prime is 18749057. The reversal of 18749016 is 61094781.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 30585 + ... + 31191.

It is an arithmetic number, because the mean of its divisors is an integer number (478800).

Almost surely, 2^18749016 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18749016, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30643200).

18749016 is an abundant number, since it is smaller than the sum of its proper divisors (42537384).

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

18749016 is a wasteful number, since it uses less digits than its factorization.

18749016 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 646 (or 636 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 36.

The square root of 18749016 is about 4330.0133948984. The cubic root of 18749016 is about 265.6599948542.

The spelling of 18749016 in words is "eighteen million, seven hundred forty-nine thousand, sixteen".