20676164 has 12 divisors (see below), whose sum is σ = 36325884. Its totient is φ = 10297344.

The previous prime is 20676151. The next prime is 20676167. The reversal of 20676164 is 46167602.

It can be written as a sum of positive squares in 2 ways, for example, as 11628100 + 9048064 = 3410^2 + 3008^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 20676164.

It is not an unprimeable number, because it can be changed into a prime (20676167) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9029 + ... + 11084.

It is an arithmetic number, because the mean of its divisors is an integer number (3027157).

Almost surely, 2^20676164 is an apocalyptic number.

It is an amenable number.

20676164 is a deficient number, since it is larger than the sum of its proper divisors (15649720).

20676164 is a wasteful number, since it uses less digits than its factorization.

20676164 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20374 (or 20372 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 32.

The square root of 20676164 is about 4547.1050130825. The cubic root of 20676164 is about 274.4669077551.

The spelling of 20676164 in words is "twenty million, six hundred seventy-six thousand, one hundred sixty-four".