20670386 has 16 divisors (see below), whose sum is σ = 34026048. Its totient is φ = 9339600.

The previous prime is 20670379. The next prime is 20670421. The reversal of 20670386 is 68307602.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1091 + ... + 6521.

It is an arithmetic number, because the mean of its divisors is an integer number (2126628).

Almost surely, 2^20670386 is an apocalyptic number.

20670386 is a deficient number, since it is larger than the sum of its proper divisors (13355662).

20670386 is a wasteful number, since it uses less digits than its factorization.

20670386 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5617.

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

The square root of 20670386 is about 4546.4696193860. The cubic root of 20670386 is about 274.4413385773.

Adding to 20670386 its reverse (68307602), we get a palindrome (88977988).

The spelling of 20670386 in words is "twenty million, six hundred seventy thousand, three hundred eighty-six".