20623606 has 4 divisors (see below), whose sum is σ = 30935412. Its totient is φ = 10311802.

The previous prime is 20623579. The next prime is 20623609. The reversal of 20623606 is 60632602.

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 (20623609) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5155900 + ... + 5155903.

It is an arithmetic number, because the mean of its divisors is an integer number (7733853).

Almost surely, 2^20623606 is an apocalyptic number.

20623606 is a deficient number, since it is larger than the sum of its proper divisors (10311806).

20623606 is a wasteful number, since it uses less digits than its factorization.

20623606 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10311805.

The product of its (nonzero) digits is 2592, while the sum is 25.

The square root of 20623606 is about 4541.3220542040. The cubic root of 20623606 is about 274.2341490418.

The spelling of 20623606 in words is "twenty million, six hundred twenty-three thousand, six hundred six".