18426540 has 48 divisors (see below), whose sum is σ = 56286720. Its totient is φ = 4466880.

The previous prime is 18426539. The next prime is 18426607. The reversal of 18426540 is 4562481.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 18426498 and 18426507.

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 15 ways as a sum of consecutive naturals, for example, 13300 + ... + 14619.

It is an arithmetic number, because the mean of its divisors is an integer number (1172640).

Almost surely, 2^18426540 is an apocalyptic number.

18426540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18426540 is an abundant number, since it is smaller than the sum of its proper divisors (37860180).

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

18426540 is a wasteful number, since it uses less digits than its factorization.

18426540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27942 (or 27940 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 30.

The square root of 18426540 is about 4292.6145878707. The cubic root of 18426540 is about 264.1280944034.

The spelling of 18426540 in words is "eighteen million, four hundred twenty-six thousand, five hundred forty".