1821479536 has 20 divisors (see below), whose sum is σ = 3714860200. Its totient is φ = 862805952.

The previous prime is 1821479509. The next prime is 1821479557. The reversal of 1821479536 is 6359741281.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 2995551 + ... + 2996158.

It is an arithmetic number, because the mean of its divisors is an integer number (185743010).

Almost surely, 2^1821479536 is an apocalyptic number.

1821479536 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1821479536 is an abundant number, since it is smaller than the sum of its proper divisors (1893380664).

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

1821479536 is a wasteful number, since it uses less digits than its factorization.

1821479536 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5991736 (or 5991730 counting only the distinct ones).

The product of its digits is 362880, while the sum is 46.

The square root of 1821479536 is about 42678.7949220687. The cubic root of 1821479536 is about 1221.2599042076.

The spelling of 1821479536 in words is "one billion, eight hundred twenty-one million, four hundred seventy-nine thousand, five hundred thirty-six".