1820672722 has 24 divisors (see below), whose sum is σ = 3105377100. Its totient is φ = 799038240.

The previous prime is 1820672719. The next prime is 1820672729. The reversal of 1820672722 is 2272760281.

It can be written as a sum of positive squares in 2 ways, for example, as 1774010161 + 46662561 = 42119^2 + 6831^2 .

It is not an unprimeable number, because it can be changed into a prime (1820672729) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 122697 + ... + 136732.

Almost surely, 2^1820672722 is an apocalyptic number.

1820672722 is a deficient number, since it is larger than the sum of its proper divisors (1284704378).

1820672722 is a wasteful number, since it uses less digits than its factorization.

1820672722 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 259482 (or 259471 counting only the distinct ones).

The product of its (nonzero) digits is 37632, while the sum is 37.

The square root of 1820672722 is about 42669.3417104131. The cubic root of 1820672722 is about 1221.0795608682.

The spelling of 1820672722 in words is "one billion, eight hundred twenty million, six hundred seventy-two thousand, seven hundred twenty-two".