20010104 has 16 divisors (see below), whose sum is σ = 37773000. Its totient is φ = 9937312.

The previous prime is 20010079. The next prime is 20010127. The reversal of 20010104 is 40101002.

It is a Harshad number since it is a multiple of its sum of digits (8).

It is a junction number, because it is equal to n+sod(n) for n = 20010091 and 20010100.

It is a congruent number.

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, 7202 + ... + 9585.

Almost surely, 2^20010104 is an apocalyptic number.

It is an amenable number.

20010104 is a deficient number, since it is larger than the sum of its proper divisors (17762896).

20010104 is a wasteful number, since it uses less digits than its factorization.

20010104 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16942 (or 16938 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 8.

The square root of 20010104 is about 4473.2654739016. The cubic root of 20010104 is about 271.4874647566.

Adding to 20010104 its reverse (40101002), we get a palindrome (60111106).

The spelling of 20010104 in words is "twenty million, ten thousand, one hundred four".