20899085 has 8 divisors (see below), whose sum is σ = 25271136. Its totient is φ = 16591120.

The previous prime is 20899061. The next prime is 20899091. The reversal of 20899085 is 58099802.

It is a happy number.

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

It is not a de Polignac number, because 20899085 - 2²⁴ = 4121869 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15299 + ... + 16608.

It is an arithmetic number, because the mean of its divisors is an integer number (3158892).

Almost surely, 2^20899085 is an apocalyptic number.

It is an amenable number.

20899085 is a deficient number, since it is larger than the sum of its proper divisors (4372051).

20899085 is a wasteful number, since it uses less digits than its factorization.

20899085 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32043.

The product of its (nonzero) digits is 51840, while the sum is 41.

The square root of 20899085 is about 4571.5517059309. The cubic root of 20899085 is about 275.4497763637.

The spelling of 20899085 in words is "twenty million, eight hundred ninety-nine thousand, eighty-five".