18946473 has 16 divisors (see below), whose sum is σ = 31092096. Its totient is φ = 9993600.

The previous prime is 18946451. The next prime is 18946511. The reversal of 18946473 is 37464981.

It is not a de Polignac number, because 18946473 - 2¹⁰ = 18945449 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18946373) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 34428 + ... + 34973.

It is an arithmetic number, because the mean of its divisors is an integer number (1943256).

Almost surely, 2^18946473 is an apocalyptic number.

18946473 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

18946473 is a deficient number, since it is larger than the sum of its proper divisors (12145623).

18946473 is a wasteful number, since it uses less digits than its factorization.

18946473 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69424.

The product of its digits is 145152, while the sum is 42.

The square root of 18946473 is about 4352.7546450495. The cubic root of 18946473 is about 266.5893475490.

The spelling of 18946473 in words is "eighteen million, nine hundred forty-six thousand, four hundred seventy-three".