18983473 has 2 divisors, whose sum is σ = 18983474. Its totient is φ = 18983472.

The previous prime is 18983467. The next prime is 18983477. The reversal of 18983473 is 37438981.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9784384 + 9199089 = 3128^2 + 3033^2 .

It is a cyclic number.

It is not a de Polignac number, because 18983473 - 2¹⁷ = 18852401 is a prime.

It is not a weakly prime, because it can be changed into another prime (18983477) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9491736 + 9491737.

It is an arithmetic number, because the mean of its divisors is an integer number (9491737).

Almost surely, 2^18983473 is an apocalyptic number.

It is an amenable number.

18983473 is a deficient number, since it is larger than the sum of its proper divisors (1).

18983473 is an equidigital number, since it uses as much as digits as its factorization.

18983473 is an evil number, because the sum of its binary digits is even.

The product of its digits is 145152, while the sum is 43.

The square root of 18983473 is about 4357.0027541878. The cubic root of 18983473 is about 266.7627728246.

The spelling of 18983473 in words is "eighteen million, nine hundred eighty-three thousand, four hundred seventy-three".