20872176 has 120 divisors (see below), whose sum is σ = 60996096. Its totient is φ = 6140160.

The previous prime is 20872153. The next prime is 20872193. The reversal of 20872176 is 67127802.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 251431 + ... + 251513.

Almost surely, 2^20872176 is an apocalyptic number.

20872176 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20872176, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30498048).

20872176 is an abundant number, since it is smaller than the sum of its proper divisors (40123920).

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

20872176 is a wasteful number, since it uses less digits than its factorization.

20872176 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 151 (or 132 counting only the distinct ones).

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

The square root of 20872176 is about 4568.6076653615. The cubic root of 20872176 is about 275.3315054523.

Adding to 20872176 its reverse (67127802), we get a palindrome (87999978).

The spelling of 20872176 in words is "twenty million, eight hundred seventy-two thousand, one hundred seventy-six".