2012172300 has 72 divisors (see below), whose sum is σ = 6468770000. Its totient is φ = 536578560.

The previous prime is 2012172289. The next prime is 2012172301. The reversal of 2012172300 is 32712102.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (2012172301) by changing a digit.

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, 369925 + ... + 375324.

Almost surely, 2^2012172300 is an apocalyptic number.

2012172300 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2012172300 is an abundant number, since it is smaller than the sum of its proper divisors (4456597700).

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

2012172300 is a wasteful number, since it uses less digits than its factorization.

2012172300 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 745272 (or 745259 counting only the distinct ones).

The product of its (nonzero) digits is 168, while the sum is 18.

The square root of 2012172300 is about 44857.2435622163. The cubic root of 2012172300 is about 1262.4719047435.

Adding to 2012172300 its reverse (32712102), we get a palindrome (2044884402).

The spelling of 2012172300 in words is "two billion, twelve million, one hundred seventy-two thousand, three hundred".