18969799 has 8 divisors (see below), whose sum is σ = 20257920. Its totient is φ = 17724000.

The previous prime is 18969793. The next prime is 18969803. The reversal of 18969799 is 99796981.

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 18969799 - 2⁵ = 18969767 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 (18969793) 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, 9652 + ... + 11449.

It is an arithmetic number, because the mean of its divisors is an integer number (2532240).

Almost surely, 2^18969799 is an apocalyptic number.

18969799 is a deficient number, since it is larger than the sum of its proper divisors (1288121).

18969799 is a wasteful number, since it uses less digits than its factorization.

18969799 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21161.

The product of its digits is 2204496, while the sum is 58.

The square root of 18969799 is about 4355.4332735102. The cubic root of 18969799 is about 266.6987067405.

The spelling of 18969799 in words is "eighteen million, nine hundred sixty-nine thousand, seven hundred ninety-nine".