20231311020 has 48 divisors (see below), whose sum is σ = 56685965280. Its totient is φ = 5391369216.

The previous prime is 20231310973. The next prime is 20231311073. The reversal of 20231311020 is 2011313202.

It is a Harshad number since it is a multiple of its sum of digits (15).

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, 23887 + ... + 202566.

It is an arithmetic number, because the mean of its divisors is an integer number (1180957610).

Almost surely, 2^20231311020 is an apocalyptic number.

20231311020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20231311020 is an abundant number, since it is smaller than the sum of its proper divisors (36454654260).

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

20231311020 is a wasteful number, since it uses less digits than its factorization.

20231311020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 227954 (or 227952 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 15.

Adding to 20231311020 its reverse (2011313202), we get a palindrome (22242624222).

The spelling of 20231311020 in words is "twenty billion, two hundred thirty-one million, three hundred eleven thousand, twenty".