18165542 has 16 divisors (see below), whose sum is σ = 28879200. Its totient is φ = 8554560.

The previous prime is 18165491. The next prime is 18165551. The reversal of 18165542 is 24556181.

It is a junction number, because it is equal to n+sod(n) for n = 18165499 and 18165508.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1442 + ... + 6197.

It is an arithmetic number, because the mean of its divisors is an integer number (1804950).

Almost surely, 2^18165542 is an apocalyptic number.

18165542 is a deficient number, since it is larger than the sum of its proper divisors (10713658).

18165542 is a wasteful number, since it uses less digits than its factorization.

18165542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7711.

The product of its digits is 9600, while the sum is 32.

The square root of 18165542 is about 4262.1053482991. The cubic root of 18165542 is about 262.8751015332.

The spelling of 18165542 in words is "eighteen million, one hundred sixty-five thousand, five hundred forty-two".