20020004040 has 64 divisors (see below), whose sum is σ = 60070377600. Its totient is φ = 5337746432.

The previous prime is 20020004023. The next prime is 20020004041. The reversal of 20020004040 is 4040002002.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a super Niven number, because it is divisible the sum of any subset of its (nonzero) digits.

It is not an unprimeable number, because it can be changed into a prime (20020004041) 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, 954304 + ... + 975056.

It is an arithmetic number, because the mean of its divisors is an integer number (938599650).

Almost surely, 2^20020004040 is an apocalyptic number.

20020004040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20020004040 is an abundant number, since it is smaller than the sum of its proper divisors (40050373560).

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

20020004040 is a wasteful number, since it uses less digits than its factorization.

20020004040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28806 (or 28802 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 12.

Adding to 20020004040 its reverse (4040002002), we get a palindrome (24060006042).

The spelling of 20020004040 in words is "twenty billion, twenty million, four thousand, forty".