2021776830 has 96 divisors (see below), whose sum is σ = 5461380288. Its totient is φ = 518515200.

The previous prime is 2021776819. The next prime is 2021776837. The reversal of 2021776830 is 386771202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2021776837) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 258132 + ... + 265848.

It is an arithmetic number, because the mean of its divisors is an integer number (56889378).

Almost surely, 2^2021776830 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2021776830, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2730690144).

2021776830 is an abundant number, since it is smaller than the sum of its proper divisors (3439603458).

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

2021776830 is a wasteful number, since it uses less digits than its factorization.

2021776830 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7842 (or 7839 counting only the distinct ones).

The product of its (nonzero) digits is 28224, while the sum is 36.

The square root of 2021776830 is about 44964.1727378587. The cubic root of 2021776830 is about 1264.4774003007.

The spelling of 2021776830 in words is "two billion, twenty-one million, seven hundred seventy-six thousand, eight hundred thirty".