20010000020 has 48 divisors (see below), whose sum is σ = 42700322448. Its totient is φ = 7875563520.

The previous prime is 20010000013. The next prime is 20010000053. The reversal of 20010000020 is 2000001002.

It can be written as a sum of positive squares in 8 ways, for example, as 2101672336 + 17908327684 = 45844^2 + 133822^2 .

It is a Harshad number since it is a multiple of its sum of digits (5).

It is a junction number, because it is equal to n+sod(n) for n = 20009999959 and 20010000013.

It is a congruent number.

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, 305810 + ... + 365430.

It is an arithmetic number, because the mean of its divisors is an integer number (889590051).

Almost surely, 2^20010000020 is an apocalyptic number.

20010000020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20010000020 is an abundant number, since it is smaller than the sum of its proper divisors (22690322428).

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

20010000020 is a wasteful number, since it uses less digits than its factorization.

20010000020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59900 (or 59898 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 5.

Adding to 20010000020 its reverse (2000001002), we get a palindrome (22010001022).

The spelling of 20010000020 in words is "twenty billion, ten million, twenty", and thus it is an aban number and an uban number.