18649716 has 48 divisors (see below), whose sum is σ = 46186560. Its totient is φ = 5840640.

The previous prime is 18649699. The next prime is 18649717. The reversal of 18649716 is 61794681.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18649717) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 35536 + ... + 36056.

It is an arithmetic number, because the mean of its divisors is an integer number (962220).

Almost surely, 2^18649716 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 18649716, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23093280).

18649716 is an abundant number, since it is smaller than the sum of its proper divisors (27536844).

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

18649716 is a wasteful number, since it uses less digits than its factorization.

18649716 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 704 (or 702 counting only the distinct ones).

The product of its digits is 72576, while the sum is 42.

The square root of 18649716 is about 4318.5316949167. The cubic root of 18649716 is about 265.1901613616.

The spelling of 18649716 in words is "eighteen million, six hundred forty-nine thousand, seven hundred sixteen".