40020424220 has 48 divisors (see below), whose sum is σ = 98282731008. Its totient is φ = 13402186560.

The previous prime is 40020424211. The next prime is 40020424229. The reversal of 40020424220 is 2242402004.

It is an interprime number because it is at equal distance from previous prime (40020424211) and next prime (40020424229).

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 40020424192 and 40020424201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40020424229) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 3317936 + ... + 3329975.

It is an arithmetic number, because the mean of its divisors is an integer number (2047556896).

Almost surely, 2^40020424220 is an apocalyptic number.

It is an amenable number.

40020424220 is an abundant number, since it is smaller than the sum of its proper divisors (58262306788).

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

40020424220 is a wasteful number, since it uses less digits than its factorization.

40020424220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6647970 (or 6647968 counting only the distinct ones).

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

Adding to 40020424220 its reverse (2242402004), we get a palindrome (42262826224).

It can be divided in two parts, 400204 and 24220, that added together give a palindrome (424424).

The spelling of 40020424220 in words is "forty billion, twenty million, four hundred twenty-four thousand, two hundred twenty".