18442473 has 24 divisors (see below), whose sum is σ = 28892160. Its totient is φ = 10432800.

The previous prime is 18442453. The next prime is 18442477. The reversal of 18442473 is 37424481.

It is not a de Polignac number, because 18442473 - 2⁵ = 18442441 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18442477) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 15448 + ... + 16598.

It is an arithmetic number, because the mean of its divisors is an integer number (1203840).

Almost surely, 2^18442473 is an apocalyptic number.

It is an amenable number.

18442473 is a deficient number, since it is larger than the sum of its proper divisors (10449687).

18442473 is a wasteful number, since it uses less digits than its factorization.

18442473 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1277 (or 1270 counting only the distinct ones).

The product of its digits is 21504, while the sum is 33.

The square root of 18442473 is about 4294.4700487953. The cubic root of 18442473 is about 264.2042009424.

It can be divided in two parts, 18442 and 473, that added together give a triangular number (18915 = T₁₉₄).

The spelling of 18442473 in words is "eighteen million, four hundred forty-two thousand, four hundred seventy-three".