1821342300 has 72 divisors (see below), whose sum is σ = 5274662400. Its totient is φ = 485238720.

The previous prime is 1821342293. The next prime is 1821342319. The reversal of 1821342300 is 32431281.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 429591 + ... + 433809.

It is an arithmetic number, because the mean of its divisors is an integer number (73259200).

Almost surely, 2^1821342300 is an apocalyptic number.

1821342300 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1821342300 is an abundant number, since it is smaller than the sum of its proper divisors (3453320100).

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

1821342300 is a wasteful number, since it uses less digits than its factorization.

1821342300 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5675 (or 5668 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 24.

The square root of 1821342300 is about 42677.1871144292. The cubic root of 1821342300 is about 1221.2292322492.

Adding to 1821342300 its reverse (32431281), we get a palindrome (1853773581).

The spelling of 1821342300 in words is "one billion, eight hundred twenty-one million, three hundred forty-two thousand, three hundred".