20886307 has 4 divisors (see below), whose sum is σ = 22492960. Its totient is φ = 19279656.

The previous prime is 20886289. The next prime is 20886329. The reversal of 20886307 is 70368802.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20886307 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20886367) 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, 803307 + ... + 803332.

It is an arithmetic number, because the mean of its divisors is an integer number (5623240).

Almost surely, 2^20886307 is an apocalyptic number.

20886307 is a deficient number, since it is larger than the sum of its proper divisors (1606653).

20886307 is a wasteful number, since it uses less digits than its factorization.

20886307 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1606652.

The product of its (nonzero) digits is 16128, while the sum is 34.

The square root of 20886307 is about 4570.1539361383. The cubic root of 20886307 is about 275.3936269387.

The spelling of 20886307 in words is "twenty million, eight hundred eighty-six thousand, three hundred seven".