18942416 has 20 divisors (see below), whose sum is σ = 37029252. Its totient is φ = 9386496.

The previous prime is 18942401. The next prime is 18942419. The reversal of 18942416 is 61424981.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 5953600 + 12988816 = 2440^2 + 3604^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18942419) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3431 + ... + 7046.

Almost surely, 2^18942416 is an apocalyptic number.

18942416 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

18942416 is a deficient number, since it is larger than the sum of its proper divisors (18086836).

18942416 is a wasteful number, since it uses less digits than its factorization.

18942416 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10598 (or 10592 counting only the distinct ones).

The product of its digits is 13824, while the sum is 35.

The square root of 18942416 is about 4352.2885933725. The cubic root of 18942416 is about 266.5703179705.

The spelling of 18942416 in words is "eighteen million, nine hundred forty-two thousand, four hundred sixteen".