18680894 has 4 divisors (see below), whose sum is σ = 28021344. Its totient is φ = 9340446.

The previous prime is 18680891. The next prime is 18680897. The reversal of 18680894 is 49808681.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 49808681 = 13 ⋅3831437.

It is an interprime number because it is at equal distance from previous prime (18680891) and next prime (18680897).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18680891) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4670222 + ... + 4670225.

It is an arithmetic number, because the mean of its divisors is an integer number (7005336).

Almost surely, 2^18680894 is an apocalyptic number.

18680894 is a deficient number, since it is larger than the sum of its proper divisors (9340450).

18680894 is an equidigital number, since it uses as much as digits as its factorization.

18680894 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9340449.

The product of its (nonzero) digits is 110592, while the sum is 44.

The square root of 18680894 is about 4322.1399792233. The cubic root of 18680894 is about 265.3378579034.

The spelling of 18680894 in words is "eighteen million, six hundred eighty thousand, eight hundred ninety-four".