18227542 has 4 divisors (see below), whose sum is σ = 27341316. Its totient is φ = 9113770.

The previous prime is 18227537. The next prime is 18227611. The reversal of 18227542 is 24572281.

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: 24572281 = 139 ⋅176779.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

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, 4556884 + ... + 4556887.

It is an arithmetic number, because the mean of its divisors is an integer number (6835329).

Almost surely, 2^18227542 is an apocalyptic number.

18227542 is a deficient number, since it is larger than the sum of its proper divisors (9113774).

18227542 is an equidigital number, since it uses as much as digits as its factorization.

18227542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9113773.

The product of its digits is 8960, while the sum is 31.

The square root of 18227542 is about 4269.3725534322. The cubic root of 18227542 is about 263.1738310195.

It can be divided in two parts, 18227 and 542, that added together give a square (18769 = 137²).

The spelling of 18227542 in words is "eighteen million, two hundred twenty-seven thousand, five hundred forty-two".