40204040220 has 36 divisors (see below), whose sum is σ = 121952255880. Its totient is φ = 10721077344.

The previous prime is 40204040203. The next prime is 40204040237. The reversal of 40204040220 is 2204040204.

40204040220 is a `hidden beast` number, since 40 + 2 + 0 + 404 + 0 + 220 = 666.

It is an interprime number because it is at equal distance from previous prime (40204040203) and next prime (40204040237).

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-2 number, since 2×40204040220² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 40204040193 and 40204040202.

It is a congruent number.

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 11 ways as a sum of consecutive naturals, for example, 111677710 + ... + 111678069.

Almost surely, 2^40204040220 is an apocalyptic number.

It is an amenable number.

40204040220 is an abundant number, since it is smaller than the sum of its proper divisors (81748215660).

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

40204040220 is a wasteful number, since it uses less digits than its factorization.

40204040220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 223355794 (or 223355789 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 18.

Adding to 40204040220 its reverse (2204040204), we get a palindrome (42408080424).

The spelling of 40204040220 in words is "forty billion, two hundred four million, forty thousand, two hundred twenty".