20864107 has 4 divisors (see below), whose sum is σ = 22760856. Its totient is φ = 18967360.

The previous prime is 20864101. The next prime is 20864119. The reversal of 20864107 is 70146802.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20864107 - 2¹¹ = 20862059 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20864101) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 948358 + ... + 948379.

It is an arithmetic number, because the mean of its divisors is an integer number (5690214).

Almost surely, 2^20864107 is an apocalyptic number.

20864107 is a deficient number, since it is larger than the sum of its proper divisors (1896749).

20864107 is a wasteful number, since it uses less digits than its factorization.

20864107 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1896748.

The product of its (nonzero) digits is 2688, while the sum is 28.

The square root of 20864107 is about 4567.7244881888. The cubic root of 20864107 is about 275.2960206316.

The spelling of 20864107 in words is "twenty million, eight hundred sixty-four thousand, one hundred seven".