20870106 has 16 divisors (see below), whose sum is σ = 41860800. Its totient is φ = 6936608.

The previous prime is 20870089. The next prime is 20870117. The reversal of 20870106 is 60107802.

It is a super-2 number, since 2×20870106² = 871122648902472, which contains 22 as substring.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2691 + ... + 6998.

It is an arithmetic number, because the mean of its divisors is an integer number (2616300).

Almost surely, 2^20870106 is an apocalyptic number.

20870106 is an abundant number, since it is smaller than the sum of its proper divisors (20990694).

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

20870106 is a wasteful number, since it uses less digits than its factorization.

20870106 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10053.

The product of its (nonzero) digits is 672, while the sum is 24.

The square root of 20870106 is about 4568.3811136988. The cubic root of 20870106 is about 275.3224031421.

Adding to 20870106 its reverse (60107802), we get a palindrome (80977908).

Subtracting 20870106 from its reverse (60107802), we obtain a square (39237696 = 6264²).

The spelling of 20870106 in words is "twenty million, eight hundred seventy thousand, one hundred six".