18949497 has 8 divisors (see below), whose sum is σ = 28875456. Its totient is φ = 10828272.

The previous prime is 18949487. The next prime is 18949523. The reversal of 18949497 is 79494981.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 18949497 - 2¹¹ = 18947449 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18949417) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 451158 + ... + 451199.

It is an arithmetic number, because the mean of its divisors is an integer number (3609432).

Almost surely, 2^18949497 is an apocalyptic number.

It is an amenable number.

18949497 is a deficient number, since it is larger than the sum of its proper divisors (9925959).

18949497 is an equidigital number, since it uses as much as digits as its factorization.

18949497 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 902367.

The product of its digits is 653184, while the sum is 51.

The square root of 18949497 is about 4353.1019974267. The cubic root of 18949497 is about 266.6035300181.

It can be divided in two parts, 1 and 8949497, that added together give a palindrome (8949498).

The spelling of 18949497 in words is "eighteen million, nine hundred forty-nine thousand, four hundred ninety-seven".