20311020220 has 96 divisors (see below), whose sum is σ = 43905576960. Its totient is φ = 7889967360.

The previous prime is 20311020179. The next prime is 20311020229. The reversal of 20311020220 is 2202011302.

It is a self number, because there is not a number n which added to its sum of digits gives 20311020220.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20311020229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 51161062 + ... + 51161458.

It is an arithmetic number, because the mean of its divisors is an integer number (457349760).

Almost surely, 2^20311020220 is an apocalyptic number.

20311020220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20311020220 is an abundant number, since it is smaller than the sum of its proper divisors (23594556740).

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

20311020220 is a wasteful number, since it uses less digits than its factorization.

20311020220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 883 (or 881 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 13.

Adding to 20311020220 its reverse (2202011302), we get a palindrome (22513031522).

The spelling of 20311020220 in words is "twenty billion, three hundred eleven million, twenty thousand, two hundred twenty".