20210104 has 16 divisors (see below), whose sum is σ = 37950120. Its totient is φ = 10090080.

The previous prime is 20210101. The next prime is 20210107. The reversal of 20210104 is 40101202.

It is an interprime number because it is at equal distance from previous prime (20210101) and next prime (20210107).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20210101) by changing a digit.

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, 5634 + ... + 8494.

Almost surely, 2^20210104 is an apocalyptic number.

It is an amenable number.

20210104 is a deficient number, since it is larger than the sum of its proper divisors (17740016).

20210104 is a wasteful number, since it uses less digits than its factorization.

20210104 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3750 (or 3746 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 10.

The square root of 20210104 is about 4495.5649255683. The cubic root of 20210104 is about 272.3889691591.

Adding to 20210104 its reverse (40101202), we get a palindrome (60311306).

The spelling of 20210104 in words is "twenty million, two hundred ten thousand, one hundred four".