1821045953 has 8 divisors (see below), whose sum is σ = 1901223168. Its totient is φ = 1740952224.

The previous prime is 1821045931. The next prime is 1821045959. The reversal of 1821045953 is 3595401281.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1821045953 - 2¹² = 1821041857 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1821045959) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25976 + ... + 65702.

It is an arithmetic number, because the mean of its divisors is an integer number (237652896).

Almost surely, 2^1821045953 is an apocalyptic number.

It is an amenable number.

1821045953 is a deficient number, since it is larger than the sum of its proper divisors (80177215).

1821045953 is a wasteful number, since it uses less digits than its factorization.

1821045953 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41743.

The product of its (nonzero) digits is 43200, while the sum is 38.

The square root of 1821045953 is about 42673.7150128741. The cubic root of 1821045953 is about 1221.1629940596.

The spelling of 1821045953 in words is "one billion, eight hundred twenty-one million, forty-five thousand, nine hundred fifty-three".