20898885 has 16 divisors (see below), whose sum is σ = 38215296. Its totient is φ = 9553728.

The previous prime is 20898883. The next prime is 20898887. The reversal of 20898885 is 58889802.

It is an interprime number because it is at equal distance from previous prime (20898883) and next prime (20898887).

It is not a de Polignac number, because 20898885 - 2¹ = 20898883 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20898883) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 99414 + ... + 99623.

It is an arithmetic number, because the mean of its divisors is an integer number (2388456).

Almost surely, 2^20898885 is an apocalyptic number.

It is an amenable number.

20898885 is a deficient number, since it is larger than the sum of its proper divisors (17316411).

20898885 is a wasteful number, since it uses less digits than its factorization.

20898885 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 199052.

The product of its (nonzero) digits is 368640, while the sum is 48.

The square root of 20898885 is about 4571.5298314678. The cubic root of 20898885 is about 275.4488976948.

The spelling of 20898885 in words is "twenty million, eight hundred ninety-eight thousand, eight hundred eighty-five".