20110020020 has 24 divisors (see below), whose sum is σ = 43027856424. Its totient is φ = 7892233856.

The previous prime is 20110019981. The next prime is 20110020037. The reversal of 20110020020 is 2002001102.

It can be written as a sum of positive squares in 4 ways, for example, as 5090537104 + 15019482916 = 71348^2 + 122554^2 .

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, 9484799 + ... + 9486918.

It is an arithmetic number, because the mean of its divisors is an integer number (1792827351).

Almost surely, 2^20110020020 is an apocalyptic number.

20110020020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20110020020 is an abundant number, since it is smaller than the sum of its proper divisors (22917836404).

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

20110020020 is a wasteful number, since it uses less digits than its factorization.

20110020020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18971779 (or 18971777 counting only the distinct ones).

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

Adding to 20110020020 its reverse (2002001102), we get a palindrome (22112021122).

The spelling of 20110020020 in words is "twenty billion, one hundred ten million, twenty thousand, twenty".