20211311020 has 24 divisors (see below), whose sum is σ = 42981019200. Its totient is φ = 7982188032.

The previous prime is 20211311017. The next prime is 20211311039. The reversal of 20211311020 is 2011311202.

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, 6394405 + ... + 6397564.

It is an arithmetic number, because the mean of its divisors is an integer number (1790875800).

Almost surely, 2^20211311020 is an apocalyptic number.

20211311020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20211311020 is an abundant number, since it is smaller than the sum of its proper divisors (22769708180).

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

20211311020 is a wasteful number, since it uses less digits than its factorization.

20211311020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12792057 (or 12792055 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 13.

Adding to 20211311020 its reverse (2011311202), we get a palindrome (22222622222).

The spelling of 20211311020 in words is "twenty billion, two hundred eleven million, three hundred eleven thousand, twenty".