20316885 has 16 divisors (see below), whose sum is σ = 33386496. Its totient is φ = 10542528.

The previous prime is 20316883. The next prime is 20316893. The reversal of 20316885 is 58861302.

It is a happy number.

It is not a de Polignac number, because 20316885 - 2¹ = 20316883 is a prime.

It is a super-2 number, since 2×20316885² = 825551632206450, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20316883) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17749 + ... + 18858.

It is an arithmetic number, because the mean of its divisors is an integer number (2086656).

Almost surely, 2^20316885 is an apocalyptic number.

It is an amenable number.

20316885 is a deficient number, since it is larger than the sum of its proper divisors (13069611).

20316885 is a wasteful number, since it uses less digits than its factorization.

20316885 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36652.

The product of its (nonzero) digits is 11520, while the sum is 33.

The square root of 20316885 is about 4507.4255401504. The cubic root of 20316885 is about 272.8678532307.

The spelling of 20316885 in words is "twenty million, three hundred sixteen thousand, eight hundred eighty-five".