20110211020 has 24 divisors (see below), whose sum is σ = 42293304144. Its totient is φ = 8032301376.

The previous prime is 20110210999. The next prime is 20110211053. The reversal of 20110211020 is 2011201102.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a junction number, because it is equal to n+sod(n) for n = 20110210988 and 20110211006.

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, 722439 + ... + 749758.

It is an arithmetic number, because the mean of its divisors is an integer number (1762221006).

Almost surely, 2^20110211020 is an apocalyptic number.

20110211020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20110211020 is an abundant number, since it is smaller than the sum of its proper divisors (22183093124).

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

20110211020 is a wasteful number, since it uses less digits than its factorization.

20110211020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1472889 (or 1472887 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 20110211020 its reverse (2011201102), we get a palindrome (22121412122).

The spelling of 20110211020 in words is "twenty billion, one hundred ten million, two hundred eleven thousand, twenty".