20111322020 has 24 divisors (see below), whose sum is σ = 42238547064. Its totient is φ = 8043620096.

The previous prime is 20111322019. The next prime is 20111322037. The reversal of 20111322020 is 2022311102.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 1149481216 + 18961840804 = 33904^2 + 137702^2 .

It is a junction number, because it is equal to n+sod(n) for n = 20111321986 and 20111322004.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 141584 + ... + 245496.

It is an arithmetic number, because the mean of its divisors is an integer number (1759939461).

Almost surely, 2^20111322020 is an apocalyptic number.

20111322020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20111322020 is an abundant number, since it is smaller than the sum of its proper divisors (22127225044).

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

20111322020 is a wasteful number, since it uses less digits than its factorization.

20111322020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 113599 (or 113597 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 14.

Adding to 20111322020 its reverse (2022311102), we get a palindrome (22133633122).

The spelling of 20111322020 in words is "twenty billion, one hundred eleven million, three hundred twenty-two thousand, twenty".