20210106 has 32 divisors (see below), whose sum is σ = 46350720. Its totient is φ = 5754816.

The previous prime is 20210101. The next prime is 20210107. The reversal of 20210106 is 60101202.

It is a junction number, because it is equal to n+sod(n) for n = 20210091 and 20210100.

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

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15720 + ... + 16956.

It is an arithmetic number, because the mean of its divisors is an integer number (1448460).

Almost surely, 2^20210106 is an apocalyptic number.

20210106 is an abundant number, since it is smaller than the sum of its proper divisors (26140614).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20210106 is a wasteful number, since it uses less digits than its factorization.

20210106 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1638.

The product of its (nonzero) digits is 24, while the sum is 12.

The square root of 20210106 is about 4495.5651480098. The cubic root of 20210106 is about 272.3889781443.

Adding to 20210106 its reverse (60101202), we get a palindrome (80311308).

The spelling of 20210106 in words is "twenty million, two hundred ten thousand, one hundred six".