20110020 has 48 divisors (see below), whose sum is σ = 64353408. Its totient is φ = 4596480.

The previous prime is 20109989. The next prime is 20110043. The reversal of 20110020 is 2001102.

It is a happy number.

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 = 20109990 and 20110008.

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, 23521 + ... + 24360.

It is an arithmetic number, because the mean of its divisors is an integer number (1340696).

Almost surely, 2^20110020 is an apocalyptic number.

20110020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20110020 is an abundant number, since it is smaller than the sum of its proper divisors (44243388).

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

20110020 is a wasteful number, since it uses less digits than its factorization.

20110020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47900 (or 47898 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 6.

The square root of 20110020 is about 4484.4196948992. The cubic root of 20110020 is about 271.9385854711.

Adding to 20110020 its reverse (2001102), we get a palindrome (22111122).

The spelling of 20110020 in words is "twenty million, one hundred ten thousand, twenty".