18046819 has 4 divisors (see below), whose sum is σ = 20624944. Its totient is φ = 15468696.

The previous prime is 18046817. The next prime is 18046823. The reversal of 18046819 is 91864081.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 91864081 = 37 ⋅2482813.

It is a cyclic number.

It is not a de Polignac number, because 18046819 - 2¹ = 18046817 is a prime.

It is a super-2 number, since 2×18046819² = 651375352037522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18046811) 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, 1289052 + ... + 1289065.

It is an arithmetic number, because the mean of its divisors is an integer number (5156236).

Almost surely, 2^18046819 is an apocalyptic number.

18046819 is a deficient number, since it is larger than the sum of its proper divisors (2578125).

18046819 is an equidigital number, since it uses as much as digits as its factorization.

18046819 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2578124.

The product of its (nonzero) digits is 13824, while the sum is 37.

The square root of 18046819 is about 4248.1547758998. The cubic root of 18046819 is about 262.3011658305.

The spelling of 18046819 in words is "eighteen million, forty-six thousand, eight hundred nineteen".