20672875 has 8 divisors (see below), whose sum is σ = 25799904. Its totient is φ = 16538200.

The previous prime is 20672863. The next prime is 20672879. The reversal of 20672875 is 57827602.

It is not a de Polignac number, because 20672875 - 2⁵ = 20672843 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20672879) 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, 82567 + ... + 82816.

It is an arithmetic number, because the mean of its divisors is an integer number (3224988).

Almost surely, 2^20672875 is an apocalyptic number.

20672875 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

20672875 is a deficient number, since it is larger than the sum of its proper divisors (5127029).

20672875 is an equidigital number, since it uses as much as digits as its factorization.

20672875 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 165398 (or 165388 counting only the distinct ones).

The product of its (nonzero) digits is 47040, while the sum is 37.

The square root of 20672875 is about 4546.7433400182. The cubic root of 20672875 is about 274.4523536446.

The spelling of 20672875 in words is "twenty million, six hundred seventy-two thousand, eight hundred seventy-five".