18457797 has 16 divisors (see below), whose sum is σ = 26240000. Its totient is φ = 11507184.

The previous prime is 18457781. The next prime is 18457811. The reversal of 18457797 is 79775481.

It is not a de Polignac number, because 18457797 - 2⁴ = 18457781 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18457757) 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 15 ways as a sum of consecutive naturals, for example, 2454 + ... + 6552.

It is an arithmetic number, because the mean of its divisors is an integer number (1640000).

Almost surely, 2^18457797 is an apocalyptic number.

It is an amenable number.

18457797 is a deficient number, since it is larger than the sum of its proper divisors (7782203).

18457797 is a wasteful number, since it uses less digits than its factorization.

18457797 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4200.

The product of its digits is 493920, while the sum is 48.

The square root of 18457797 is about 4296.2538332831. The cubic root of 18457797 is about 264.2773571534.

The spelling of 18457797 in words is "eighteen million, four hundred fifty-seven thousand, seven hundred ninety-seven".