18941616 has 60 divisors (see below), whose sum is σ = 53357200. Its totient is φ = 6272640.

The previous prime is 18941567. The next prime is 18941623. The reversal of 18941616 is 61614981.

It is a happy number.

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

It is a nude number because it is divisible by every one of its digits.

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 polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 28326 + ... + 28986.

Almost surely, 2^18941616 is an apocalyptic number.

18941616 is a gapful number since it is divisible by the number (16) 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 18941616, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26678600).

18941616 is an abundant number, since it is smaller than the sum of its proper divisors (34415584).

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

18941616 is a wasteful number, since it uses less digits than its factorization.

18941616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 874 (or 865 counting only the distinct ones).

The product of its digits is 10368, while the sum is 36.

The square root of 18941616 is about 4352.1966867319. The cubic root of 18941616 is about 266.5665652063.

The spelling of 18941616 in words is "eighteen million, nine hundred forty-one thousand, six hundred sixteen".