1821050520 has 64 divisors (see below), whose sum is σ = 5473336320. Its totient is φ = 484708224.

The previous prime is 1821050509. The next prime is 1821050521. The reversal of 1821050520 is 250501281.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1821050521) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 51769 + ... + 79511.

It is an arithmetic number, because the mean of its divisors is an integer number (85520880).

Almost surely, 2^1821050520 is an apocalyptic number.

1821050520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1821050520 is an abundant number, since it is smaller than the sum of its proper divisors (3652285800).

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

1821050520 is a wasteful number, since it uses less digits than its factorization.

1821050520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28304 (or 28300 counting only the distinct ones).

The product of its (nonzero) digits is 800, while the sum is 24.

The square root of 1821050520 is about 42673.7685235321. The cubic root of 1821050520 is about 1221.1640149101.

The spelling of 1821050520 in words is "one billion, eight hundred twenty-one million, fifty thousand, five hundred twenty".