18953473 has 16 divisors (see below), whose sum is σ = 23823360. Its totient is φ = 14648400.

The previous prime is 18953461. The next prime is 18953479. The reversal of 18953473 is 37435981.

It is a cyclic number.

It is not a de Polignac number, because 18953473 - 2⁹ = 18952961 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18953479) 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, 9148 + ... + 11026.

It is an arithmetic number, because the mean of its divisors is an integer number (1488960).

Almost surely, 2^18953473 is an apocalyptic number.

It is an amenable number.

18953473 is a deficient number, since it is larger than the sum of its proper divisors (4869887).

18953473 is a wasteful number, since it uses less digits than its factorization.

18953473 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2028.

The product of its digits is 90720, while the sum is 40.

The square root of 18953473 is about 4353.5586593039. The cubic root of 18953473 is about 266.6221750425.

The spelling of 18953473 in words is "eighteen million, nine hundred fifty-three thousand, four hundred seventy-three".