20105104 has 20 divisors (see below), whose sum is σ = 39128076. Its totient is φ = 10007552.

The previous prime is 20105089. The next prime is 20105117. The reversal of 20105104 is 40150102.

It can be written as a sum of positive squares in 2 ways, for example, as 12531600 + 7573504 = 3540^2 + 2752^2 .

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 in 3 ways as a sum of consecutive naturals, for example, 1032 + ... + 6424.

Almost surely, 2^20105104 is an apocalyptic number.

It is an amenable number.

20105104 is a deficient number, since it is larger than the sum of its proper divisors (19022972).

20105104 is a wasteful number, since it uses less digits than its factorization.

20105104 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5634 (or 5628 counting only the distinct ones).

The product of its (nonzero) digits is 40, while the sum is 13.

The square root of 20105104 is about 4483.8715414249. The cubic root of 20105104 is about 271.9164247268.

Adding to 20105104 its reverse (40150102), we get a palindrome (60255206).

The spelling of 20105104 in words is "twenty million, one hundred five thousand, one hundred four".