18405126 has 12 divisors (see below), whose sum is σ = 39877812. Its totient is φ = 6135036.

The previous prime is 18405113. The next prime is 18405131. The reversal of 18405126 is 62150481.

It is a self number, because there is not a number n which added to its sum of digits gives 18405126.

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 5 ways as a sum of consecutive naturals, for example, 511236 + ... + 511271.

It is an arithmetic number, because the mean of its divisors is an integer number (3323151).

Almost surely, 2^18405126 is an apocalyptic number.

18405126 is an abundant number, since it is smaller than the sum of its proper divisors (21472686).

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

18405126 is a wasteful number, since it uses less digits than its factorization.

18405126 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1022515 (or 1022512 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 27.

The square root of 18405126 is about 4290.1195787530. The cubic root of 18405126 is about 264.0257378488.

The spelling of 18405126 in words is "eighteen million, four hundred five thousand, one hundred twenty-six".