18142436 has 24 divisors (see below), whose sum is σ = 34345080. Its totient is φ = 8335872.

The previous prime is 18142427. The next prime is 18142463. The reversal of 18142436 is 63424181.

It can be written as a sum of positive squares in 4 ways, for example, as 1577536 + 16564900 = 1256^2 + 4070^2 .

It is a super-3 number, since 3×18142436³ (a number of 23 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 18142399 and 18142408.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13340 + ... + 14636.

It is an arithmetic number, because the mean of its divisors is an integer number (1431045).

Almost surely, 2^18142436 is an apocalyptic number.

It is an amenable number.

18142436 is a deficient number, since it is larger than the sum of its proper divisors (16202644).

18142436 is a wasteful number, since it uses less digits than its factorization.

18142436 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1583 (or 1581 counting only the distinct ones).

The product of its digits is 4608, while the sum is 29.

The square root of 18142436 is about 4259.3938535900. The cubic root of 18142436 is about 262.7635979471.

The spelling of 18142436 in words is "eighteen million, one hundred forty-two thousand, four hundred thirty-six".