18374849 has 4 divisors (see below), whose sum is σ = 18481236. Its totient is φ = 18268464.

The previous prime is 18374833. The next prime is 18374857. The reversal of 18374849 is 94847381.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 94847381 = 349 ⋅271769.

It can be written as a sum of positive squares in 2 ways, for example, as 10195249 + 8179600 = 3193^2 + 2860^2 .

It is a cyclic number.

It is not a de Polignac number, because 18374849 - 2⁴ = 18374833 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18374879) 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, 52934 + ... + 53279.

It is an arithmetic number, because the mean of its divisors is an integer number (4620309).

Almost surely, 2^18374849 is an apocalyptic number.

It is an amenable number.

18374849 is a deficient number, since it is larger than the sum of its proper divisors (106387).

18374849 is a wasteful number, since it uses less digits than its factorization.

18374849 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106386.

The product of its digits is 193536, while the sum is 44.

The square root of 18374849 is about 4286.5894368367. The cubic root of 18374849 is about 263.8808815611.

The spelling of 18374849 in words is "eighteen million, three hundred seventy-four thousand, eight hundred forty-nine".