20212311040 has 88 divisors (see below), whose sum is σ = 48606211512. Its totient is φ = 8064860160.

The previous prime is 20212311011. The next prime is 20212311071. The reversal of 20212311040 is 4011321202.

It can be written as a sum of positive squares in 4 ways, for example, as 1340145664 + 18872165376 = 36608^2 + 137376^2 .

It is a Harshad number since it is a multiple of its sum of digits (16).

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, 2150832 + ... + 2160208.

Almost surely, 2^20212311040 is an apocalyptic number.

20212311040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20212311040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24303105756).

20212311040 is an abundant number, since it is smaller than the sum of its proper divisors (28393900472).

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

20212311040 is an equidigital number, since it uses as much as digits as its factorization.

20212311040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9823 (or 9805 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 16.

Adding to 20212311040 its reverse (4011321202), we get a palindrome (24223632242).

The spelling of 20212311040 in words is "twenty billion, two hundred twelve million, three hundred eleven thousand, forty".