1821185016 has 32 divisors (see below), whose sum is σ = 5203386240. Its totient is φ = 520338528.

The previous prime is 1821184997. The next prime is 1821185021. The reversal of 1821185016 is 6105811281.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5420026 + ... + 5420361.

It is an arithmetic number, because the mean of its divisors is an integer number (162605820).

Almost surely, 2^1821185016 is an apocalyptic number.

It is an amenable number.

1821185016 is an abundant number, since it is smaller than the sum of its proper divisors (3382201224).

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

1821185016 is a wasteful number, since it uses less digits than its factorization.

1821185016 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10840403 (or 10840399 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 33.

The square root of 1821185016 is about 42675.3443571344. The cubic root of 1821185016 is about 1221.1940777100.

Adding to 1821185016 its reverse (6105811281), we get a palindrome (7926996297).

The spelling of 1821185016 in words is "one billion, eight hundred twenty-one million, one hundred eighty-five thousand, sixteen".