18889670 has 16 divisors (see below), whose sum is σ = 35480160. Its totient is φ = 7227264.

The previous prime is 18889649. The next prime is 18889679. The reversal of 18889670 is 7698881.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18889679) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 40835 + ... + 41294.

It is an arithmetic number, because the mean of its divisors is an integer number (2217510).

Almost surely, 2^18889670 is an apocalyptic number.

18889670 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18889670 is a deficient number, since it is larger than the sum of its proper divisors (16590490).

18889670 is a wasteful number, since it uses less digits than its factorization.

18889670 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82159.

The product of its (nonzero) digits is 193536, while the sum is 47.

The square root of 18889670 is about 4346.2247986040. The cubic root of 18889670 is about 266.3226623224.

The spelling of 18889670 in words is "eighteen million, eight hundred eighty-nine thousand, six hundred seventy".