18354937 has 4 divisors (see below), whose sum is σ = 18781840. Its totient is φ = 17928036.

The previous prime is 18354913. The next prime is 18354949. The reversal of 18354937 is 73945381.

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, and also an emirpimes, since its reverse is a distinct semiprime: 73945381 = 353 ⋅209477.

It is a cyclic number.

It is not a de Polignac number, because 18354937 - 2²³ = 9966329 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 18354937.

It is not an unprimeable number, because it can be changed into a prime (18354967) 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 3 ways as a sum of consecutive naturals, for example, 213387 + ... + 213472.

It is an arithmetic number, because the mean of its divisors is an integer number (4695460).

Almost surely, 2^18354937 is an apocalyptic number.

It is an amenable number.

18354937 is a deficient number, since it is larger than the sum of its proper divisors (426903).

18354937 is an equidigital number, since it uses as much as digits as its factorization.

18354937 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 426902.

The product of its digits is 90720, while the sum is 40.

The square root of 18354937 is about 4284.2662148844. The cubic root of 18354937 is about 263.7855284829.

It can be divided in two parts, 18354 and 937, that added together give a palindrome (19291).

The spelling of 18354937 in words is "eighteen million, three hundred fifty-four thousand, nine hundred thirty-seven".