2021940900 has 864 divisors, whose sum is σ = 8549452800. Its totient is φ = 406425600.

The previous prime is 2021940863. The next prime is 2021940959. The reversal of 2021940900 is 90491202.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 287 ways as a sum of consecutive naturals, for example, 65223885 + ... + 65223915.

It is an arithmetic number, because the mean of its divisors is an integer number (9895200).

Almost surely, 2^2021940900 is an apocalyptic number.

2021940900 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 2021940900, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4274726400).

2021940900 is an abundant number, since it is smaller than the sum of its proper divisors (6527511900).

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

2021940900 is a wasteful number, since it uses less digits than its factorization.

2021940900 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 114 (or 94 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 27.

The square root of 2021940900 is about 44965.9971534047. The cubic root of 2021940900 is about 1264.5116040750.

The spelling of 2021940900 in words is "two billion, twenty-one million, nine hundred forty thousand, nine hundred".