18894573 has 32 divisors (see below), whose sum is σ = 29520000. Its totient is φ = 11926656.

The previous prime is 18894571. The next prime is 18894581. The reversal of 18894573 is 37549881.

It is not a de Polignac number, because 18894573 - 2¹ = 18894571 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18894571) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 45993 + ... + 46401.

It is an arithmetic number, because the mean of its divisors is an integer number (922500).

Almost surely, 2^18894573 is an apocalyptic number.

It is an amenable number.

18894573 is a deficient number, since it is larger than the sum of its proper divisors (10625427).

18894573 is a wasteful number, since it uses less digits than its factorization.

18894573 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 506 (or 500 counting only the distinct ones).

The product of its digits is 241920, while the sum is 45.

The square root of 18894573 is about 4346.7888147459. The cubic root of 18894573 is about 266.3457025529.

The spelling of 18894573 in words is "eighteen million, eight hundred ninety-four thousand, five hundred seventy-three".