20313887 has 8 divisors (see below), whose sum is σ = 22204800. Its totient is φ = 18430360.

The previous prime is 20313871. The next prime is 20313913. The reversal of 20313887 is 78831302.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20313887 - 2⁴ = 20313871 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20310887) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5048 + ... + 8130.

It is an arithmetic number, because the mean of its divisors is an integer number (2775600).

Almost surely, 2^20313887 is an apocalyptic number.

20313887 is a deficient number, since it is larger than the sum of its proper divisors (1890913).

20313887 is a wasteful number, since it uses less digits than its factorization.

20313887 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3693.

The product of its (nonzero) digits is 8064, while the sum is 32.

The square root of 20313887 is about 4507.0929655378. The cubic root of 20313887 is about 272.8544309293.

The spelling of 20313887 in words is "twenty million, three hundred thirteen thousand, eight hundred eighty-seven".