20361604 has 6 divisors (see below), whose sum is σ = 35632814. Its totient is φ = 10180800.

The previous prime is 20361599. The next prime is 20361619. The reversal of 20361604 is 40616302.

It can be written as a sum of positive squares in only one way, i.e., 20232004 + 129600 = 4498^2 + 360^2 .

It is an unprimeable number.

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, 2545197 + ... + 2545204.

Almost surely, 2^20361604 is an apocalyptic number.

It is an amenable number.

20361604 is a deficient number, since it is larger than the sum of its proper divisors (15271210).

20361604 is a wasteful number, since it uses less digits than its factorization.

20361604 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5090405 (or 5090403 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 22.

The square root of 20361604 is about 4512.3834056959. The cubic root of 20361604 is about 273.0679074496.

Adding to 20361604 its reverse (40616302), we get a palindrome (60977906).

The spelling of 20361604 in words is "twenty million, three hundred sixty-one thousand, six hundred four".