2820067821 has 24 divisors (see below), whose sum is σ = 4173421824. Its totient is φ = 1834152480.

The previous prime is 2820067787. The next prime is 2820067849. The reversal of 2820067821 is 1287600282.

It is a happy number.

2820067821 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 2820067821 - 2²¹ = 2817970669 is a prime.

2820067821 is a modest number, since divided by 67821 gives 2820 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2820067871) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 123576 + ... + 144606.

It is an arithmetic number, because the mean of its divisors is an integer number (173892576).

Almost surely, 2^2820067821 is an apocalyptic number.

It is an amenable number.

2820067821 is a deficient number, since it is larger than the sum of its proper divisors (1353354003).

2820067821 is a wasteful number, since it uses less digits than its factorization.

2820067821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21401 (or 21398 counting only the distinct ones).

The product of its (nonzero) digits is 21504, while the sum is 36.

The square root of 2820067821 is about 53104.3107572257. The cubic root of 2820067821 is about 1412.8189702913.

The spelling of 2820067821 in words is "two billion, eight hundred twenty million, sixty-seven thousand, eight hundred twenty-one".