18073534 has 4 divisors (see below), whose sum is σ = 27110304. Its totient is φ = 9036766.

The previous prime is 18073519. The next prime is 18073543. The reversal of 18073534 is 43537081.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 43537081 = 7 ⋅6219583.

It is a junction number, because it is equal to n+sod(n) for n = 18073496 and 18073505.

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, 4518382 + ... + 4518385.

It is an arithmetic number, because the mean of its divisors is an integer number (6777576).

Almost surely, 2^18073534 is an apocalyptic number.

18073534 is a deficient number, since it is larger than the sum of its proper divisors (9036770).

18073534 is an equidigital number, since it uses as much as digits as its factorization.

18073534 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9036769.

The product of its (nonzero) digits is 10080, while the sum is 31.

The square root of 18073534 is about 4251.2979194594. The cubic root of 18073534 is about 262.4305315796.

The spelling of 18073534 in words is "eighteen million, seventy-three thousand, five hundred thirty-four".