2381018 has 4 divisors (see below), whose sum is σ = 3571530. Its totient is φ = 1190508.

The previous prime is 2381011. The next prime is 2381033. The reversal of 2381018 is 8101832.

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

It can be written as a sum of positive squares in only one way, i.e., 2380849 + 169 = 1543^2 + 13^2 .

It is an alternating number because its digits alternate between even and odd.

It is a junction number, because it is equal to n+sod(n) for n = 2380984 and 2381002.

It is not an unprimeable number, because it can be changed into a prime (2381011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 595253 + ... + 595256.

2^2381018 is an apocalyptic number.

2381018 is a deficient number, since it is larger than the sum of its proper divisors (1190512).

2381018 is a wasteful number, since it uses less digits than its factorization.

2381018 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1190511.

The product of its (nonzero) digits is 384, while the sum is 23.

The square root of 2381018 is about 1543.0547624760. The cubic root of 2381018 is about 133.5326782025.

The spelling of 2381018 in words is "two million, three hundred eighty-one thousand, eighteen".