1821912450 has 48 divisors (see below), whose sum is σ = 4528939296. Its totient is φ = 484704000.

The previous prime is 1821912431. The next prime is 1821912479. The reversal of 1821912450 is 542191281.

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 23 ways as a sum of consecutive naturals, for example, 50925 + ... + 78975.

It is an arithmetic number, because the mean of its divisors is an integer number (94352902).

Almost surely, 2^1821912450 is an apocalyptic number.

1821912450 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1821912450 is an abundant number, since it is smaller than the sum of its proper divisors (2707026846).

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

1821912450 is a wasteful number, since it uses less digits than its factorization.

1821912450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28499 (or 28494 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 33.

The square root of 1821912450 is about 42683.8663900074. The cubic root of 1821912450 is about 1221.3566494851.

The spelling of 1821912450 in words is "one billion, eight hundred twenty-one million, nine hundred twelve thousand, four hundred fifty".