18367944 has 48 divisors (see below), whose sum is σ = 53420400. Its totient is φ = 5247648.

The previous prime is 18367907. The next prime is 18367949. The reversal of 18367944 is 44976381.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a junction number, because it is equal to n+sod(n) for n = 18367896 and 18367905.

It is not an unprimeable number, because it can be changed into a prime (18367949) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6634 + ... + 8985.

It is an arithmetic number, because the mean of its divisors is an integer number (1112925).

Almost surely, 2^18367944 is an apocalyptic number.

18367944 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

18367944 is an abundant number, since it is smaller than the sum of its proper divisors (35052456).

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

18367944 is a wasteful number, since it uses less digits than its factorization.

18367944 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15642 (or 15631 counting only the distinct ones).

The product of its digits is 145152, while the sum is 42.

The square root of 18367944 is about 4285.7839422911. The cubic root of 18367944 is about 263.8478232255.

The spelling of 18367944 in words is "eighteen million, three hundred sixty-seven thousand, nine hundred forty-four".