1821368151 has 12 divisors (see below), whose sum is σ = 2785622112. Its totient is φ = 1142819136.

The previous prime is 1821368149. The next prime is 1821368167. The reversal of 1821368151 is 1518631281.

It is not a de Polignac number, because 1821368151 - 2¹ = 1821368149 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1821368651) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5952031 + ... + 5952336.

It is an arithmetic number, because the mean of its divisors is an integer number (232135176).

Almost surely, 2^1821368151 is an apocalyptic number.

1821368151 is a deficient number, since it is larger than the sum of its proper divisors (964253961).

1821368151 is a wasteful number, since it uses less digits than its factorization.

1821368151 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11904390 (or 11904387 counting only the distinct ones).

The product of its digits is 11520, while the sum is 36.

The square root of 1821368151 is about 42677.4899800820. The cubic root of 1821368151 is about 1221.2350100113.

The spelling of 1821368151 in words is "one billion, eight hundred twenty-one million, three hundred sixty-eight thousand, one hundred fifty-one".