20636104 has 8 divisors (see below), whose sum is σ = 38692710. Its totient is φ = 10318048.

The previous prime is 20636093. The next prime is 20636123. The reversal of 20636104 is 40163602.

It can be written as a sum of positive squares in only one way, i.e., 17388900 + 3247204 = 4170^2 + 1802^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1289749 + ... + 1289764.

Almost surely, 2^20636104 is an apocalyptic number.

It is an amenable number.

20636104 is a deficient number, since it is larger than the sum of its proper divisors (18056606).

20636104 is a wasteful number, since it uses less digits than its factorization.

20636104 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2579519 (or 2579515 counting only the distinct ones).

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

The square root of 20636104 is about 4542.6978768129. The cubic root of 20636104 is about 274.2895335736.

Adding to 20636104 its reverse (40163602), we get a palindrome (60799706).

The spelling of 20636104 in words is "twenty million, six hundred thirty-six thousand, one hundred four".