18969573 has 16 divisors (see below), whose sum is σ = 28983296. Its totient is φ = 10810800.

The previous prime is 18969571. The next prime is 18969583. The reversal of 18969573 is 37596981.

It is not a de Polignac number, because 18969573 - 2¹ = 18969571 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18969571) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8748 + ... + 10698.

It is an arithmetic number, because the mean of its divisors is an integer number (1811456).

Almost surely, 2^18969573 is an apocalyptic number.

It is an amenable number.

18969573 is a deficient number, since it is larger than the sum of its proper divisors (10013723).

18969573 is a wasteful number, since it uses less digits than its factorization.

18969573 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2424.

The product of its digits is 408240, while the sum is 48.

The square root of 18969573 is about 4355.4073288270. The cubic root of 18969573 is about 266.6976476158.

The spelling of 18969573 in words is "eighteen million, nine hundred sixty-nine thousand, five hundred seventy-three".