18867040 has 48 divisors (see below), whose sum is σ = 45792432. Its totient is φ = 7340544.

The previous prime is 18867031. The next prime is 18867049. The reversal of 18867040 is 4076881.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (18867031) and next prime (18867049).

It is a junction number, because it is equal to n+sod(n) for n = 18866987 and 18867005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18867049) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4327 + ... + 7513.

It is an arithmetic number, because the mean of its divisors is an integer number (954009).

Almost surely, 2^18867040 is an apocalyptic number.

18867040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18867040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22896216).

18867040 is an abundant number, since it is smaller than the sum of its proper divisors (26925392).

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

18867040 is a wasteful number, since it uses less digits than its factorization.

18867040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3239 (or 3231 counting only the distinct ones).

The product of its (nonzero) digits is 10752, while the sum is 34.

The square root of 18867040 is about 4343.6206095837. The cubic root of 18867040 is about 266.2162674832.

The spelling of 18867040 in words is "eighteen million, eight hundred sixty-seven thousand, forty".