20042020040 has 64 divisors (see below), whose sum is σ = 54249091200. Its totient is φ = 6509887488.

The previous prime is 20042020039. The next prime is 20042020109. The reversal of 20042020040 is 4002024002.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (14).

It is a junction number, because it is equal to n+sod(n) for n = 20042019997 and 20042020024.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1878329 + ... + 1888968.

It is an arithmetic number, because the mean of its divisors is an integer number (847642050).

Almost surely, 2^20042020040 is an apocalyptic number.

20042020040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20042020040 is an abundant number, since it is smaller than the sum of its proper divisors (34207071160).

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

20042020040 is a wasteful number, since it uses less digits than its factorization.

20042020040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3767334 (or 3767330 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 14.

Adding to 20042020040 its reverse (4002024002), we get a palindrome (24044044042).

The spelling of 20042020040 in words is "twenty billion, forty-two million, twenty thousand, forty".