18846973 has 4 divisors (see below), whose sum is σ = 18876928. Its totient is φ = 18817020.

The previous prime is 18846967. The next prime is 18846979. The reversal of 18846973 is 37964881.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 37964881 = 23 ⋅1650647.

It is an interprime number because it is at equal distance from previous prime (18846967) and next prime (18846979).

It is a cyclic number.

It is not a de Polignac number, because 18846973 - 2⁵ = 18846941 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18846979) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14013 + ... + 15298.

It is an arithmetic number, because the mean of its divisors is an integer number (4719232).

Almost surely, 2^18846973 is an apocalyptic number.

It is an amenable number.

18846973 is a deficient number, since it is larger than the sum of its proper divisors (29955).

18846973 is an equidigital number, since it uses as much as digits as its factorization.

18846973 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29954.

The product of its digits is 290304, while the sum is 46.

The square root of 18846973 is about 4341.3100557320. The cubic root of 18846973 is about 266.1218513845.

The spelling of 18846973 in words is "eighteen million, eight hundred forty-six thousand, nine hundred seventy-three".