40421023020 has 144 divisors (see below), whose sum is σ = 144958282560. Its totient is φ = 8920493568.

The previous prime is 40421023007. The next prime is 40421023021. The reversal of 40421023020 is 2032012404.

40421023020 is a `hidden beast` number, since 404 + 2 + 10 + 230 + 20 = 666.

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 = 40421022984 and 40421023002.

It is not an unprimeable number, because it can be changed into a prime (40421023021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 516567 + ... + 589646.

It is an arithmetic number, because the mean of its divisors is an integer number (1006654740).

Almost surely, 2^40421023020 is an apocalyptic number.

It is an amenable number.

40421023020 is an abundant number, since it is smaller than the sum of its proper divisors (104537259540).

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

40421023020 is a wasteful number, since it uses less digits than its factorization.

40421023020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1106264 (or 1106259 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

Adding to 40421023020 its reverse (2032012404), we get a palindrome (42453035424).

The spelling of 40421023020 in words is "forty billion, four hundred twenty-one million, twenty-three thousand, twenty".