18449742 has 16 divisors (see below), whose sum is σ = 38172240. Its totient is φ = 5937792.

The previous prime is 18449731. The next prime is 18449759. The reversal of 18449742 is 24794481.

It is a self number, because there is not a number n which added to its sum of digits gives 18449742.

It is a congruent number.

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, 52843 + ... + 53190.

It is an arithmetic number, because the mean of its divisors is an integer number (2385765).

Almost surely, 2^18449742 is an apocalyptic number.

18449742 is an abundant number, since it is smaller than the sum of its proper divisors (19722498).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18449742 is a wasteful number, since it uses less digits than its factorization.

18449742 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106067.

The product of its digits is 64512, while the sum is 39.

The square root of 18449742 is about 4295.3162863752. The cubic root of 18449742 is about 264.2389079305.

It can be divided in two parts, 18449 and 742, that added together give a palindrome (19191).

The spelling of 18449742 in words is "eighteen million, four hundred forty-nine thousand, seven hundred forty-two".