18040017406 has 16 divisors (see below), whose sum is σ = 27794966544. Its totient is φ = 8775091584.

The previous prime is 18040017403. The next prime is 18040017431. The reversal of 18040017406 is 60471004081.

It is a super-3 number, since 3×18040017406³ (a number of 32 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18040017403) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1009606 + ... + 1027318.

It is an arithmetic number, because the mean of its divisors is an integer number (1737185409).

Almost surely, 2^18040017406 is an apocalyptic number.

18040017406 is a deficient number, since it is larger than the sum of its proper divisors (9754949138).

18040017406 is a wasteful number, since it uses less digits than its factorization.

18040017406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31515.

The product of its (nonzero) digits is 5376, while the sum is 31.

The spelling of 18040017406 in words is "eighteen billion, forty million, seventeen thousand, four hundred six".