40018911 has 16 divisors (see below), whose sum is σ = 54942720. Its totient is φ = 25894080.

The previous prime is 40018907. The next prime is 40018931. The reversal of 40018911 is 11981004.

It is not a de Polignac number, because 40018911 - 2² = 40018907 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40018931) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26700 + ... + 28158.

It is an arithmetic number, because the mean of its divisors is an integer number (3433920).

Almost surely, 2^40018911 is an apocalyptic number.

40018911 is a gapful number since it is divisible by the number (41) formed by its first and last digit.

40018911 is a deficient number, since it is larger than the sum of its proper divisors (14923809).

40018911 is a wasteful number, since it uses less digits than its factorization.

40018911 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1726.

The product of its (nonzero) digits is 288, while the sum is 24.

The square root of 40018911 is about 6326.0501894942. The cubic root of 40018911 is about 342.0490764360.

Adding to 40018911 its reverse (11981004), we get a palindrome (51999915).

The spelling of 40018911 in words is "forty million, eighteen thousand, nine hundred eleven".