18457813 has 8 divisors (see below), whose sum is σ = 20170080. Its totient is φ = 16751280.

The previous prime is 18457811. The next prime is 18457819. The reversal of 18457813 is 31875481.

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

It is a cyclic number.

It is not a de Polignac number, because 18457813 - 2¹ = 18457811 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 (18457811) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8083 + ... + 10111.

It is an arithmetic number, because the mean of its divisors is an integer number (2521260).

Almost surely, 2^18457813 is an apocalyptic number.

It is an amenable number.

18457813 is a deficient number, since it is larger than the sum of its proper divisors (1712267).

18457813 is a wasteful number, since it uses less digits than its factorization.

18457813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2867.

The product of its digits is 26880, while the sum is 37.

The square root of 18457813 is about 4296.2556953701. The cubic root of 18457813 is about 264.2774335156.

The spelling of 18457813 in words is "eighteen million, four hundred fifty-seven thousand, eight hundred thirteen".