18768497 has 4 divisors (see below), whose sum is σ = 20474736. Its totient is φ = 17062260.

The previous prime is 18768479. The next prime is 18768499. The reversal of 18768497 is 79486781.

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 18768497 - 2¹² = 18764401 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18768499) 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, 853103 + ... + 853124.

It is an arithmetic number, because the mean of its divisors is an integer number (5118684).

Almost surely, 2^18768497 is an apocalyptic number.

It is an amenable number.

18768497 is a deficient number, since it is larger than the sum of its proper divisors (1706239).

18768497 is a wasteful number, since it uses less digits than its factorization.

18768497 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1706238.

The product of its digits is 677376, while the sum is 50.

The square root of 18768497 is about 4332.2623420102. The cubic root of 18768497 is about 265.7519735646.

It can be divided in two parts, 187684 and 97, that added together give a palindrome (187781).

The spelling of 18768497 in words is "eighteen million, seven hundred sixty-eight thousand, four hundred ninety-seven".