20220001980 has 96 divisors (see below), whose sum is σ = 59564635200. Its totient is φ = 5118289920.

The previous prime is 20220001979. The next prime is 20220001981. The reversal of 20220001980 is 8910002202.

It is an interprime number because it is at equal distance from previous prime (20220001979) and next prime (20220001981).

It is a self number, because there is not a number n which added to its sum of digits gives 20220001980.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20220001981) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 20055 + ... + 202094.

It is an arithmetic number, because the mean of its divisors is an integer number (620464950).

Almost surely, 2^20220001980 is an apocalyptic number.

20220001980 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 20220001980, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29782317600).

20220001980 is an abundant number, since it is smaller than the sum of its proper divisors (39344633220).

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

20220001980 is a wasteful number, since it uses less digits than its factorization.

20220001980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 222239 (or 222237 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 24.

The spelling of 20220001980 in words is "twenty billion, two hundred twenty million, one thousand, nine hundred eighty".