2021990880 has 576 divisors, whose sum is σ = 8470163520. Its totient is φ = 400490496.

The previous prime is 2021990869. The next prime is 2021990959. The reversal of 2021990880 is 880991202.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 5197726 + ... + 5198114.

It is an arithmetic number, because the mean of its divisors is an integer number (14705145).

Almost surely, 2^2021990880 is an apocalyptic number.

2021990880 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 2021990880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4235081760).

2021990880 is an abundant number, since it is smaller than the sum of its proper divisors (6448172640).

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

2021990880 is a wasteful number, since it uses less digits than its factorization.

2021990880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 451 (or 436 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 39.

The square root of 2021990880 is about 44966.5529032413. The cubic root of 2021990880 is about 1264.5220230689.

The spelling of 2021990880 in words is "two billion, twenty-one million, nine hundred ninety thousand, eight hundred eighty".