22020020988 has 96 divisors (see below), whose sum is σ = 59133419520. Its totient is φ = 6247272960.

The previous prime is 22020020977. The next prime is 22020020993. The reversal of 22020020988 is 88902002022.

It is a super-2 number, since 2×22020020988² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 13684728 + ... + 13686336.

It is an arithmetic number, because the mean of its divisors is an integer number (615973120).

Almost surely, 2^22020020988 is an apocalyptic number.

22020020988 is a gapful number since it is divisible by the number (28) 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 22020020988, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29566709760).

22020020988 is an abundant number, since it is smaller than the sum of its proper divisors (37113398532).

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

22020020988 is a wasteful number, since it uses less digits than its factorization.

22020020988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2667 (or 2665 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 33.

The spelling of 22020020988 in words is "twenty-two billion, twenty million, twenty thousand, nine hundred eighty-eight".