18412837 has 4 divisors (see below), whose sum is σ = 18444076. Its totient is φ = 18381600.

The previous prime is 18412817. The next prime is 18412847. The reversal of 18412837 is 73821481.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 16654561 + 1758276 = 4081^2 + 1326^2 .

It is a cyclic number.

It is not a de Polignac number, because 18412837 - 2¹⁵ = 18380069 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 (18412817) 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, 14718 + ... + 15919.

It is an arithmetic number, because the mean of its divisors is an integer number (4611019).

Almost surely, 2^18412837 is an apocalyptic number.

It is an amenable number.

18412837 is a deficient number, since it is larger than the sum of its proper divisors (31239).

18412837 is an equidigital number, since it uses as much as digits as its factorization.

18412837 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31238.

The product of its digits is 10752, while the sum is 34.

The square root of 18412837 is about 4291.0181775425. The cubic root of 18412837 is about 264.0626047197.

The spelling of 18412837 in words is "eighteen million, four hundred twelve thousand, eight hundred thirty-seven".