18994763 has 8 divisors (see below), whose sum is σ = 20150208. Its totient is φ = 17843584.

The previous prime is 18994751. The next prime is 18994771. The reversal of 18994763 is 36749981.

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

It is a cyclic number.

It is not a de Polignac number, because 18994763 - 2¹⁶ = 18929227 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18994783) 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, 16670 + ... + 17772.

It is an arithmetic number, because the mean of its divisors is an integer number (2518776).

Almost surely, 2^18994763 is an apocalyptic number.

18994763 is a deficient number, since it is larger than the sum of its proper divisors (1155445).

18994763 is a wasteful number, since it uses less digits than its factorization.

18994763 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2133.

The product of its digits is 326592, while the sum is 47.

The square root of 18994763 is about 4358.2981770411. The cubic root of 18994763 is about 266.8156460940.

The spelling of 18994763 in words is "eighteen million, nine hundred ninety-four thousand, seven hundred sixty-three".