40020420404 has 24 divisors (see below), whose sum is σ = 73988009760. Its totient is φ = 18888594336.

The previous prime is 40020420397. The next prime is 40020420431. The reversal of 40020420404 is 40402402004.

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 7 ways as a sum of consecutive naturals, for example, 929462 + ... + 971565.

It is an arithmetic number, because the mean of its divisors is an integer number (3082833740).

Almost surely, 2^40020420404 is an apocalyptic number.

It is an amenable number.

40020420404 is a deficient number, since it is larger than the sum of its proper divisors (33967589356).

40020420404 is a wasteful number, since it uses less digits than its factorization.

40020420404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1901327 (or 1901325 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 20.

Adding to 40020420404 its reverse (40402402004), we get a palindrome (80422822408).

The spelling of 40020420404 in words is "forty billion, twenty million, four hundred twenty thousand, four hundred four".