18889894 has 8 divisors (see below), whose sum is σ = 28653480. Its totient is φ = 9338736.

The previous prime is 18889841. The next prime is 18889909. The reversal of 18889894 is 49898881.

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

It is a congruent 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, 52884 + ... + 53239.

It is an arithmetic number, because the mean of its divisors is an integer number (3581685).

Almost surely, 2^18889894 is an apocalyptic number.

18889894 is a deficient number, since it is larger than the sum of its proper divisors (9763586).

18889894 is a wasteful number, since it uses less digits than its factorization.

18889894 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106214.

The product of its digits is 1327104, while the sum is 55.

The square root of 18889894 is about 4346.2505680184. The cubic root of 18889894 is about 266.3237150325.

It can be divided in two parts, 18889 and 894, that multiplied together give a triangular number (16886766 = T₅₈₁₁).

The spelling of 18889894 in words is "eighteen million, eight hundred eighty-nine thousand, eight hundred ninety-four".