20500667 has 6 divisors (see below), whose sum is σ = 22533924. Its totient is φ = 18636860.

The previous prime is 20500643. The next prime is 20500679. The reversal of 20500667 is 76600502.

It is not a de Polignac number, because 20500667 - 2¹² = 20496571 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20500687) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 84593 + ... + 84834.

It is an arithmetic number, because the mean of its divisors is an integer number (3755654).

Almost surely, 2^20500667 is an apocalyptic number.

20500667 is a deficient number, since it is larger than the sum of its proper divisors (2033257).

20500667 is a wasteful number, since it uses less digits than its factorization.

20500667 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 169449 (or 169438 counting only the distinct ones).

The product of its (nonzero) digits is 2520, while the sum is 26.

The square root of 20500667 is about 4527.7662262975. The cubic root of 20500667 is about 273.6881519682.

The spelling of 20500667 in words is "twenty million, five hundred thousand, six hundred sixty-seven".