18493934 has 4 divisors (see below), whose sum is σ = 27740904. Its totient is φ = 9246966.

The previous prime is 18493927. The next prime is 18493991. The reversal of 18493934 is 43939481.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 43939481 = 1367 ⋅32143.

It is a junction number, because it is equal to n+sod(n) for n = 18493891 and 18493900.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4623482 + ... + 4623485.

It is an arithmetic number, because the mean of its divisors is an integer number (6935226).

Almost surely, 2^18493934 is an apocalyptic number.

18493934 is a deficient number, since it is larger than the sum of its proper divisors (9246970).

18493934 is an equidigital number, since it uses as much as digits as its factorization.

18493934 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9246969.

The product of its digits is 93312, while the sum is 41.

The square root of 18493934 is about 4300.4574175313. The cubic root of 18493934 is about 264.4497136759.

The spelling of 18493934 in words is "eighteen million, four hundred ninety-three thousand, nine hundred thirty-four".