1821917048 has 32 divisors (see below), whose sum is σ = 3906597600. Its totient is φ = 780323712.

The previous prime is 1821917021. The next prime is 1821917057. The reversal of 1821917048 is 8407191281.

It is a junction number, because it is equal to n+sod(n) for n = 1821916996 and 1821917014.

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 86186 + ... + 105222.

It is an arithmetic number, because the mean of its divisors is an integer number (122081175).

Almost surely, 2^1821917048 is an apocalyptic number.

It is an amenable number.

1821917048 is an abundant number, since it is smaller than the sum of its proper divisors (2084680552).

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

1821917048 is a wasteful number, since it uses less digits than its factorization.

1821917048 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20759 (or 20755 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 41.

The square root of 1821917048 is about 42683.9202510735. The cubic root of 1821917048 is about 1221.3576769390.

The spelling of 1821917048 in words is "one billion, eight hundred twenty-one million, nine hundred seventeen thousand, forty-eight".