20612366 has 4 divisors (see below), whose sum is σ = 30918552. Its totient is φ = 10306182.

The previous prime is 20612357. The next prime is 20612369. The reversal of 20612366 is 66321602.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20612369) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5153090 + ... + 5153093.

It is an arithmetic number, because the mean of its divisors is an integer number (7729638).

Almost surely, 2^20612366 is an apocalyptic number.

20612366 is a deficient number, since it is larger than the sum of its proper divisors (10306186).

20612366 is a wasteful number, since it uses less digits than its factorization.

20612366 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10306185.

The product of its (nonzero) digits is 2592, while the sum is 26.

The square root of 20612366 is about 4540.0843604497. The cubic root of 20612366 is about 274.1843201874.

Adding to 20612366 its reverse (66321602), we get a palindrome (86933968).

The spelling of 20612366 in words is "twenty million, six hundred twelve thousand, three hundred sixty-six".