18781314 has 16 divisors (see below), whose sum is σ = 37985760. Its totient is φ = 6189920.

The previous prime is 18781313. The next prime is 18781333. The reversal of 18781314 is 41318781.

It is not an unprimeable number, because it can be changed into a prime (18781313) 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, 17052 + ... + 18119.

It is an arithmetic number, because the mean of its divisors is an integer number (2374110).

Almost surely, 2^18781314 is an apocalyptic number.

18781314 is an abundant number, since it is smaller than the sum of its proper divisors (19204446).

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

18781314 is a wasteful number, since it uses less digits than its factorization.

18781314 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35265.

The product of its digits is 5376, while the sum is 33.

The square root of 18781314 is about 4333.7413397664. The cubic root of 18781314 is about 265.8124537758.

The spelling of 18781314 in words is "eighteen million, seven hundred eighty-one thousand, three hundred fourteen".