1820773212 has 24 divisors (see below), whose sum is σ = 4250015616. Its totient is φ = 606703728.

The previous prime is 1820773193. The next prime is 1820773243. The reversal of 1820773212 is 2123770281.

1820773212 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

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, 8703 + ... + 60969.

It is an arithmetic number, because the mean of its divisors is an integer number (177083984).

Almost surely, 2^1820773212 is an apocalyptic number.

1820773212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1820773212 is an abundant number, since it is smaller than the sum of its proper divisors (2429242404).

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

1820773212 is a wasteful number, since it uses less digits than its factorization.

1820773212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55177 (or 55175 counting only the distinct ones).

The product of its (nonzero) digits is 9408, while the sum is 33.

The square root of 1820773212 is about 42670.5192375251. The cubic root of 1820773212 is about 1221.1020258297.

It can be divided in two parts, 18207 and 73212, that added together give a palindrome (91419).

The spelling of 1820773212 in words is "one billion, eight hundred twenty million, seven hundred seventy-three thousand, two hundred twelve".