18377442 has 40 divisors (see below), whose sum is σ = 43607916. Its totient is φ = 5764608.

The previous prime is 18377413. The next prime is 18377449. The reversal of 18377442 is 24477381.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 17969121 + 408321 = 4239^2 + 639^2 .

It is a junction number, because it is equal to n+sod(n) for n = 18377397 and 18377406.

It is not an unprimeable number, because it can be changed into a prime (18377449) by changing a digit.

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 19 ways as a sum of consecutive naturals, for example, 583 + ... + 6090.

Almost surely, 2^18377442 is an apocalyptic number.

18377442 is an abundant number, since it is smaller than the sum of its proper divisors (25230474).

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

18377442 is a wasteful number, since it uses less digits than its factorization.

18377442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6704 (or 6695 counting only the distinct ones).

The product of its digits is 37632, while the sum is 36.

The square root of 18377442 is about 4286.8918810719. The cubic root of 18377442 is about 263.8932936530.

The spelling of 18377442 in words is "eighteen million, three hundred seventy-seven thousand, four hundred forty-two".