18950978 has 8 divisors (see below), whose sum is σ = 29406780. Its totient is φ = 9148720.

The previous prime is 18950963. The next prime is 18950989. The reversal of 18950978 is 87905981.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 17833729 + 1117249 = 4223^2 + 1057^2 .

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

It is a Curzon 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, 163313 + ... + 163428.

Almost surely, 2^18950978 is an apocalyptic number.

18950978 is a deficient number, since it is larger than the sum of its proper divisors (10455802).

18950978 is a wasteful number, since it uses less digits than its factorization.

18950978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 326772.

The product of its (nonzero) digits is 181440, while the sum is 47.

The square root of 18950978 is about 4353.2721026832. The cubic root of 18950978 is about 266.6104753131.

The spelling of 18950978 in words is "eighteen million, nine hundred fifty thousand, nine hundred seventy-eight".