4000000020 has 24 divisors (see below), whose sum is σ = 11200000224. Its totient is φ = 1066666656.

The previous prime is 4000000019. The next prime is 4000000063. The reversal of 4000000020 is 200000004.

It is a Harshad number since it is a multiple of its sum of digits (6).

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

It is a junction number, because it is equal to n+sod(n) for n = 3999999945 and 4000000008.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 33333274 + ... + 33333393.

It is an arithmetic number, because the mean of its divisors is an integer number (466666676).

Almost surely, 2^4000000020 is an apocalyptic number.

It is an amenable number.

4000000020 is an abundant number, since it is smaller than the sum of its proper divisors (7200000204).

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

4000000020 is a wasteful number, since it uses less digits than its factorization.

4000000020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66666679 (or 66666677 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 6.

The square root of 4000000020 is about 63245.5533614815. The cubic root of 4000000020 is about 1587.4010546139.

Adding to 4000000020 its reverse (200000004), we get a palindrome (4200000024).

The spelling of 4000000020 in words is "four billion, twenty", and thus it is an aban number.