1845036921 has 16 divisors (see below), whose sum is σ = 3027753344. Its totient is φ = 973206144.

The previous prime is 1845036917. The next prime is 1845036923. The reversal of 1845036921 is 1296305481.

It is not a de Polignac number, because 1845036921 - 2² = 1845036917 is a prime.

It is a super-2 number, since 2×1845036921² = 6808322479706320482, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a self number, because there is not a number n which added to its sum of digits gives 1845036921.

It is not an unprimeable number, because it can be changed into a prime (1845036923) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3378916 + ... + 3379461.

It is an arithmetic number, because the mean of its divisors is an integer number (189234584).

Almost surely, 2^1845036921 is an apocalyptic number.

It is an amenable number.

1845036921 is a deficient number, since it is larger than the sum of its proper divisors (1182716423).

1845036921 is a wasteful number, since it uses less digits than its factorization.

1845036921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6758400.

The product of its (nonzero) digits is 51840, while the sum is 39.

The square root of 1845036921 is about 42953.8929667615. The cubic root of 1845036921 is about 1226.5022627005.

The spelling of 1845036921 in words is "one billion, eight hundred forty-five million, thirty-six thousand, nine hundred twenty-one".