18953297 has 4 divisors (see below), whose sum is σ = 20676336. Its totient is φ = 17230260.

The previous prime is 18953293. The next prime is 18953303. The reversal of 18953297 is 79235981.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 18953297 - 2² = 18953293 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18953293) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 861503 + ... + 861524.

It is an arithmetic number, because the mean of its divisors is an integer number (5169084).

Almost surely, 2^18953297 is an apocalyptic number.

It is an amenable number.

18953297 is a deficient number, since it is larger than the sum of its proper divisors (1723039).

18953297 is a wasteful number, since it uses less digits than its factorization.

18953297 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1723038.

The product of its digits is 136080, while the sum is 44.

The square root of 18953297 is about 4353.5384459081. The cubic root of 18953297 is about 266.6213497646.

The spelling of 18953297 in words is "eighteen million, nine hundred fifty-three thousand, two hundred ninety-seven".