1821187052 has 12 divisors (see below), whose sum is σ = 3194474976. Its totient is φ = 908479920.

The previous prime is 1821187019. The next prime is 1821187063. The reversal of 1821187052 is 2507811281.

It is a hoax number, since the sum of its digits (35) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 526463 + ... + 529910.

It is an arithmetic number, because the mean of its divisors is an integer number (266206248).

Almost surely, 2^1821187052 is an apocalyptic number.

It is an amenable number.

1821187052 is a deficient number, since it is larger than the sum of its proper divisors (1373287924).

1821187052 is a wasteful number, since it uses less digits than its factorization.

1821187052 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1056808 (or 1056806 counting only the distinct ones).

The product of its (nonzero) digits is 8960, while the sum is 35.

The square root of 1821187052 is about 42675.3682116511. The cubic root of 1821187052 is about 1221.1945327891.

The spelling of 1821187052 in words is "one billion, eight hundred twenty-one million, one hundred eighty-seven thousand, fifty-two".