20320604 has 6 divisors (see below), whose sum is σ = 35561064. Its totient is φ = 10160300.

The previous prime is 20320583. The next prime is 20320609. The reversal of 20320604 is 40602302.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20320609) 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, 2540072 + ... + 2540079.

It is an arithmetic number, because the mean of its divisors is an integer number (5926844).

Almost surely, 2^20320604 is an apocalyptic number.

It is an amenable number.

20320604 is a deficient number, since it is larger than the sum of its proper divisors (15240460).

20320604 is a wasteful number, since it uses less digits than its factorization.

20320604 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5080155 (or 5080153 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 17.

The square root of 20320604 is about 4507.8380627525. The cubic root of 20320604 is about 272.8845016758.

Adding to 20320604 its reverse (40602302), we get a palindrome (60922906).

The spelling of 20320604 in words is "twenty million, three hundred twenty thousand, six hundred four".