2764021820 has 24 divisors (see below), whose sum is σ = 6633652704. Its totient is φ = 947664576.

The previous prime is 2764021817. The next prime is 2764021831. The reversal of 2764021820 is 281204672.

2764021820 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×2764021820² = 15279633242872224800, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9871367 + ... + 9871646.

It is an arithmetic number, because the mean of its divisors is an integer number (276402196).

Almost surely, 2^2764021820 is an apocalyptic number.

2764021820 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2764021820 is an abundant number, since it is smaller than the sum of its proper divisors (3869630884).

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

2764021820 is a wasteful number, since it uses less digits than its factorization.

2764021820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19743029 (or 19743027 counting only the distinct ones).

The product of its (nonzero) digits is 10752, while the sum is 32.

The square root of 2764021820 is about 52573.9652299501. The cubic root of 2764021820 is about 1403.3968230438.

The spelling of 2764021820 in words is "two billion, seven hundred sixty-four million, twenty-one thousand, eight hundred twenty".