20000870 has 16 divisors (see below), whose sum is σ = 36167040. Its totient is φ = 7963584.

The previous prime is 20000867. The next prime is 20000873. The reversal of 20000870 is 7800002.

It is an interprime number because it is at equal distance from previous prime (20000867) and next prime (20000873).

It is a congruent number.

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 in 7 ways as a sum of consecutive naturals, for example, 2255 + ... + 6714.

It is an arithmetic number, because the mean of its divisors is an integer number (2260440).

Almost surely, 2^20000870 is an apocalyptic number.

20000870 is a deficient number, since it is larger than the sum of its proper divisors (16166170).

20000870 is a wasteful number, since it uses less digits than its factorization.

20000870 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9199.

The product of its (nonzero) digits is 112, while the sum is 17.

The square root of 20000870 is about 4472.2332228988. The cubic root of 20000870 is about 271.4456975080.

Adding to 20000870 its reverse (7800002), we get a palindrome (27800872).

The spelling of 20000870 in words is "twenty million, eight hundred seventy", and thus it is an aban number.