1820521248 has 96 divisors (see below), whose sum is σ = 5881712256. Its totient is φ = 480135168.

The previous prime is 1820521247. The next prime is 1820521259. The reversal of 1820521248 is 8421250281.

It is a tau number, because it is divible by the number of its divisors (96).

It is a super-2 number, since 2×1820521248² = 6628595228838955008, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1820521243) 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 15 ways as a sum of consecutive naturals, for example, 95461 + ... + 112932.

It is an arithmetic number, because the mean of its divisors is an integer number (61267836).

Almost surely, 2^1820521248 is an apocalyptic number.

It is an amenable number.

1820521248 is an abundant number, since it is smaller than the sum of its proper divisors (4061191008).

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

1820521248 is a wasteful number, since it uses less digits than its factorization.

1820521248 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 208426 (or 208418 counting only the distinct ones).

The product of its (nonzero) digits is 10240, while the sum is 33.

The square root of 1820521248 is about 42667.5666988405. The cubic root of 1820521248 is about 1221.0456966573.

The spelling of 1820521248 in words is "one billion, eight hundred twenty million, five hundred twenty-one thousand, two hundred forty-eight".