20672163 has 6 divisors (see below), whose sum is σ = 29859804. Its totient is φ = 13781436.

The previous prime is 20672131. The next prime is 20672227. The reversal of 20672163 is 36127602.

It is a happy number.

It is not a de Polignac number, because 20672163 - 2⁵ = 20672131 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20672123) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1148445 + ... + 1148462.

It is an arithmetic number, because the mean of its divisors is an integer number (4976634).

Almost surely, 2^20672163 is an apocalyptic number.

20672163 is a deficient number, since it is larger than the sum of its proper divisors (9187641).

20672163 is a wasteful number, since it uses less digits than its factorization.

20672163 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2296913 (or 2296910 counting only the distinct ones).

The product of its (nonzero) digits is 3024, while the sum is 27.

The square root of 20672163 is about 4546.6650415442. The cubic root of 20672163 is about 274.4492027795.

Adding to 20672163 its reverse (36127602), we get a palindrome (56799765).

The spelling of 20672163 in words is "twenty million, six hundred seventy-two thousand, one hundred sixty-three".