20667026 has 8 divisors (see below), whose sum is σ = 31079820. Its totient is φ = 10307088.

The previous prime is 20667013. The next prime is 20667029. The reversal of 20667026 is 62076602.

It can be written as a sum of positive squares in 2 ways, for example, as 19811401 + 855625 = 4451^2 + 925^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

It is a zygodrome in base 8.

It is a self number, because there is not a number n which added to its sum of digits gives 20667026.

It is not an unprimeable number, because it can be changed into a prime (20667029) 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 3 ways as a sum of consecutive naturals, for example, 12221 + ... + 13808.

Almost surely, 2^20667026 is an apocalyptic number.

20667026 is a deficient number, since it is larger than the sum of its proper divisors (10412794).

20667026 is a wasteful number, since it uses less digits than its factorization.

20667026 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26428.

The product of its (nonzero) digits is 6048, while the sum is 29.

The square root of 20667026 is about 4546.1000868877. The cubic root of 20667026 is about 274.4264674977.

The spelling of 20667026 in words is "twenty million, six hundred sixty-seven thousand, twenty-six".