40123200018 has 16 divisors (see below), whose sum is σ = 87541527456. Its totient is φ = 12158545440.

The previous prime is 40123199959. The next prime is 40123200041. The reversal of 40123200018 is 81000232104.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 40123199967 and 40123200003.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 303963571 + ... + 303963702.

It is an arithmetic number, because the mean of its divisors is an integer number (5471345466).

Almost surely, 2^40123200018 is an apocalyptic number.

40123200018 is an abundant number, since it is smaller than the sum of its proper divisors (47418327438).

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

40123200018 is a wasteful number, since it uses less digits than its factorization.

40123200018 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 607927289.

The product of its (nonzero) digits is 384, while the sum is 21.

The spelling of 40123200018 in words is "forty billion, one hundred twenty-three million, two hundred thousand, eighteen".