20836089 has 16 divisors (see below), whose sum is σ = 31059840. Its totient is φ = 13804560.

The previous prime is 20836073. The next prime is 20836111. The reversal of 20836089 is 98063802.

It is not a de Polignac number, because 20836089 - 2⁴ = 20836073 is a prime.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (20836009) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2199 + ... + 6819.

It is an arithmetic number, because the mean of its divisors is an integer number (1941240).

Almost surely, 2^20836089 is an apocalyptic number.

It is an amenable number.

20836089 is a deficient number, since it is larger than the sum of its proper divisors (10223751).

20836089 is a wasteful number, since it uses less digits than its factorization.

20836089 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4797 (or 4791 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 36.

The square root of 20836089 is about 4564.6565040537. The cubic root of 20836089 is about 275.1727355542.

The spelling of 20836089 in words is "twenty million, eight hundred thirty-six thousand, eighty-nine".