18412894 has 4 divisors (see below), whose sum is σ = 27619344. Its totient is φ = 9206446.

The previous prime is 18412879. The next prime is 18412931. The reversal of 18412894 is 49821481.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 49821481 = 71 ⋅701711.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4603222 + ... + 4603225.

It is an arithmetic number, because the mean of its divisors is an integer number (6904836).

Almost surely, 2^18412894 is an apocalyptic number.

18412894 is a deficient number, since it is larger than the sum of its proper divisors (9206450).

18412894 is an equidigital number, since it uses as much as digits as its factorization.

18412894 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9206449.

The product of its digits is 18432, while the sum is 37.

The square root of 18412894 is about 4291.0248193176. The cubic root of 18412894 is about 264.0628772026.

It can be divided in two parts, 18412 and 894, that added together give a triangular number (19306 = T₁₉₆).

The spelling of 18412894 in words is "eighteen million, four hundred twelve thousand, eight hundred ninety-four".