20510104 has 8 divisors (see below), whose sum is σ = 38456460. Its totient is φ = 10255048.

The previous prime is 20510071. The next prime is 20510137. The reversal of 20510104 is 40101502.

It is an interprime number because it is at equal distance from previous prime (20510071) and next prime (20510137).

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1281874 + ... + 1281889.

Almost surely, 2^20510104 is an apocalyptic number.

It is an amenable number.

20510104 is a deficient number, since it is larger than the sum of its proper divisors (17946356).

20510104 is a wasteful number, since it uses less digits than its factorization.

20510104 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2563769 (or 2563765 counting only the distinct ones).

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

The square root of 20510104 is about 4528.8082317537. The cubic root of 20510104 is about 273.7301408277.

Adding to 20510104 its reverse (40101502), we get a palindrome (60611606).

The spelling of 20510104 in words is "twenty million, five hundred ten thousand, one hundred four".