20604266 has 8 divisors (see below), whose sum is σ = 30946944. Its totient is φ = 10288620.

The previous prime is 20604247. The next prime is 20604277. The reversal of 20604266 is 66240602.

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

It is an unprimeable number.

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, 4730 + ... + 7973.

It is an arithmetic number, because the mean of its divisors is an integer number (3868368).

Almost surely, 2^20604266 is an apocalyptic number.

20604266 is a deficient number, since it is larger than the sum of its proper divisors (10342678).

20604266 is a wasteful number, since it uses less digits than its factorization.

20604266 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13516.

The product of its (nonzero) digits is 3456, while the sum is 26.

The square root of 20604266 is about 4539.1922188865. The cubic root of 20604266 is about 274.1484002616.

Adding to 20604266 its reverse (66240602), we get a palindrome (86844868).

The spelling of 20604266 in words is "twenty million, six hundred four thousand, two hundred sixty-six".