2021669280 has 240 divisors, whose sum is σ = 7288807680. Its totient is φ = 527482368.

The previous prime is 2021669267. The next prime is 2021669297. The reversal of 2021669280 is 829661202.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (240).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 607461 + ... + 610779.

It is an arithmetic number, because the mean of its divisors is an integer number (30370032).

Almost surely, 2^2021669280 is an apocalyptic number.

2021669280 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 2021669280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3644403840).

2021669280 is an abundant number, since it is smaller than the sum of its proper divisors (5267138400).

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

2021669280 is a wasteful number, since it uses less digits than its factorization.

2021669280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3393 (or 3376 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 36.

The square root of 2021669280 is about 44962.9767697825. The cubic root of 2021669280 is about 1264.4549782816.

The spelling of 2021669280 in words is "two billion, twenty-one million, six hundred sixty-nine thousand, two hundred eighty".