18843074 has 4 divisors (see below), whose sum is σ = 28264614. Its totient is φ = 9421536.

The previous prime is 18843061. The next prime is 18843091. The reversal of 18843074 is 47034881.

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: 47034881 = 37 ⋅1271213.

It can be written as a sum of positive squares in only one way, i.e., 14250625 + 4592449 = 3775^2 + 2143^2 .

It is a super-2 number, since 2×18843074² = 710122875538952, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4710767 + ... + 4710770.

Almost surely, 2^18843074 is an apocalyptic number.

18843074 is a deficient number, since it is larger than the sum of its proper divisors (9421540).

18843074 is an equidigital number, since it uses as much as digits as its factorization.

18843074 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9421539.

The product of its (nonzero) digits is 21504, while the sum is 35.

The square root of 18843074 is about 4340.8609745072. The cubic root of 18843074 is about 266.1034986467.

The spelling of 18843074 in words is "eighteen million, eight hundred forty-three thousand, seventy-four".