2021439006720 has 1728 divisors, whose sum is σ = 8625449851200. Its totient is φ = 452595548160.

The previous prime is 2021439006677. The next prime is 2021439006751. The reversal of 2021439006720 is 276009341202.

2021439006720 is a `hidden beast` number, since 202 + 1 + 4 + 390 + 0 + 67 + 2 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (1728).

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 polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 7193732980 + ... + 7193733260.

It is an arithmetic number, because the mean of its divisors is an integer number (4991579775).

Almost surely, 2^{2021439006720} is an apocalyptic number.

2021439006720 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 2021439006720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4312724925600).

2021439006720 is an abundant number, since it is smaller than the sum of its proper divisors (6604010844480).

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

2021439006720 is an equidigital number, since it uses as much as digits as its factorization.

2021439006720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 396 (or 357 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 36.

The spelling of 2021439006720 in words is "two trillion, twenty-one billion, four hundred thirty-nine million, six thousand, seven hundred twenty".