18920994 has 8 divisors (see below), whose sum is σ = 37842000. Its totient is φ = 6306996.

The previous prime is 18920987. The next prime is 18921011. The reversal of 18920994 is 49902981.

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

18920994 is an admirable number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1576744 + ... + 1576755.

It is an arithmetic number, because the mean of its divisors is an integer number (4730250).

Almost surely, 2^18920994 is an apocalyptic number.

18920994 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

18920994 is a wasteful number, since it uses less digits than its factorization.

18920994 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3153504.

The product of its (nonzero) digits is 46656, while the sum is 42.

The square root of 18920994 is about 4349.8268931074. The cubic root of 18920994 is about 266.4697918397.

The spelling of 18920994 in words is "eighteen million, nine hundred twenty thousand, nine hundred ninety-four".