16818473 has 4 divisors (see below), whose sum is σ = 19221120. Its totient is φ = 14415828.

The previous prime is 16818469. The next prime is 16818479. The reversal of 16818473 is 37481861.

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.

It is not a de Polignac number, because 16818473 - 2² = 16818469 is a prime.

It is a super-2 number, since 2×16818473² = 565722068103458, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16818479) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1201313 + ... + 1201326.

It is an arithmetic number, because the mean of its divisors is an integer number (4805280).

Almost surely, 2^16818473 is an apocalyptic number.

It is an amenable number.

16818473 is a deficient number, since it is larger than the sum of its proper divisors (2402647).

16818473 is an equidigital number, since it uses as much as digits as its factorization.

16818473 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2402646.

The product of its digits is 32256, while the sum is 38.

The square root of 16818473 is about 4101.0331625092. The cubic root of 16818473 is about 256.2096721784.

The spelling of 16818473 in words is "sixteen million, eight hundred eighteen thousand, four hundred seventy-three".