18940685 has 8 divisors (see below), whose sum is σ = 22880256. Its totient is φ = 15051600.

The previous prime is 18940667. The next prime is 18940687. The reversal of 18940685 is 58604981.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 18940685 - 2¹⁶ = 18875149 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18940687) 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, 11789 + ... + 13298.

It is an arithmetic number, because the mean of its divisors is an integer number (2860032).

Almost surely, 2^18940685 is an apocalyptic number.

It is an amenable number.

18940685 is a deficient number, since it is larger than the sum of its proper divisors (3939571).

18940685 is a wasteful number, since it uses less digits than its factorization.

18940685 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25243.

The product of its (nonzero) digits is 69120, while the sum is 41.

The square root of 18940685 is about 4352.0897279353. The cubic root of 18940685 is about 266.5621977941.

The spelling of 18940685 in words is "eighteen million, nine hundred forty thousand, six hundred eighty-five".