1822812100 has 72 divisors (see below), whose sum is σ = 4139110080. Its totient is φ = 695460480.

The previous prime is 1822812091. The next prime is 1822812119. The reversal of 1822812100 is 12182281.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1018006 + ... + 1019794.

It is an arithmetic number, because the mean of its divisors is an integer number (57487640).

Almost surely, 2^1822812100 is an apocalyptic number.

1822812100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1822812100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2069555040).

1822812100 is an abundant number, since it is smaller than the sum of its proper divisors (2316297980).

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

1822812100 is a wasteful number, since it uses less digits than its factorization.

1822812100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2269 (or 2262 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 25.

The square root of 1822812100 is about 42694.4036145254. The cubic root of 1822812100 is about 1221.5576493923.

Adding to 1822812100 its reverse (12182281), we get a palindrome (1834994381).

The spelling of 1822812100 in words is "one billion, eight hundred twenty-two million, eight hundred twelve thousand, one hundred".