20000872 has 8 divisors (see below), whose sum is σ = 37501650. Its totient is φ = 10000432.

The previous prime is 20000867. The next prime is 20000873. The reversal of 20000872 is 27800002.

It can be written as a sum of positive squares in only one way, i.e., 19236996 + 763876 = 4386^2 + 874^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a hoax number, since the sum of its digits (19) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (20000873) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1250047 + ... + 1250062.

Almost surely, 2^20000872 is an apocalyptic number.

It is an amenable number.

20000872 is a deficient number, since it is larger than the sum of its proper divisors (17500778).

20000872 is a wasteful number, since it uses less digits than its factorization.

20000872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2500115 (or 2500111 counting only the distinct ones).

The product of its (nonzero) digits is 224, while the sum is 19.

The square root of 20000872 is about 4472.2334465008. The cubic root of 20000872 is about 271.4457065558.

Adding to 20000872 its reverse (27800002), we get a palindrome (47800874).

The spelling of 20000872 in words is "twenty million, eight hundred seventy-two", and thus it is an aban number.