20320886 has 4 divisors (see below), whose sum is σ = 30481332. Its totient is φ = 10160442.

The previous prime is 20320877. The next prime is 20320907. The reversal of 20320886 is 68802302.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5080220 + ... + 5080223.

It is an arithmetic number, because the mean of its divisors is an integer number (7620333).

Almost surely, 2^20320886 is an apocalyptic number.

20320886 is a deficient number, since it is larger than the sum of its proper divisors (10160446).

20320886 is a wasteful number, since it uses less digits than its factorization.

20320886 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10160445.

The product of its (nonzero) digits is 4608, while the sum is 29.

The square root of 20320886 is about 4507.8693414960. The cubic root of 20320886 is about 272.8857639919.

The spelling of 20320886 in words is "twenty million, three hundred twenty thousand, eight hundred eighty-six".