18797374 has 4 divisors (see below), whose sum is σ = 28196064. Its totient is φ = 9398686.

The previous prime is 18797347. The next prime is 18797381. The reversal of 18797374 is 47379781.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 47379781 = 383 ⋅123707.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4699342 + ... + 4699345.

It is an arithmetic number, because the mean of its divisors is an integer number (7049016).

Almost surely, 2^18797374 is an apocalyptic number.

18797374 is a deficient number, since it is larger than the sum of its proper divisors (9398690).

18797374 is an equidigital number, since it uses as much as digits as its factorization.

18797374 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9398689.

The product of its digits is 296352, while the sum is 46.

The square root of 18797374 is about 4335.5938462914. The cubic root of 18797374 is about 265.8881980640. Note that the first 3 decimals are identical.

The spelling of 18797374 in words is "eighteen million, seven hundred ninety-seven thousand, three hundred seventy-four".