18706416 has 40 divisors (see below), whose sum is σ = 48580224. Its totient is φ = 6202560.

The previous prime is 18706411. The next prime is 18706427. The reversal of 18706416 is 61460781.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18706411) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9205 + ... + 11051.

Almost surely, 2^18706416 is an apocalyptic number.

18706416 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

18706416 is an abundant number, since it is smaller than the sum of its proper divisors (29873808).

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

18706416 is a wasteful number, since it uses less digits than its factorization.

18706416 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2069 (or 2063 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 33.

The square root of 18706416 is about 4325.0914441200. The cubic root of 18706416 is about 265.4586385467.

The spelling of 18706416 in words is "eighteen million, seven hundred six thousand, four hundred sixteen".