18822542 has 4 divisors (see below), whose sum is σ = 28233816. Its totient is φ = 9411270.

The previous prime is 18822497. The next prime is 18822547. The reversal of 18822542 is 24522881.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 24522881 = 2063 ⋅11887.

It is a junction number, because it is equal to n+sod(n) for n = 18822499 and 18822508.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18822547) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4705634 + ... + 4705637.

It is an arithmetic number, because the mean of its divisors is an integer number (7058454).

Almost surely, 2^18822542 is an apocalyptic number.

18822542 is a deficient number, since it is larger than the sum of its proper divisors (9411274).

18822542 is an equidigital number, since it uses as much as digits as its factorization.

18822542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9411273.

The product of its digits is 10240, while the sum is 32.

The square root of 18822542 is about 4338.4953612975. The cubic root of 18822542 is about 266.0068119687.

The spelling of 18822542 in words is "eighteen million, eight hundred twenty-two thousand, five hundred forty-two".