20766089 has 8 divisors (see below), whose sum is σ = 21228480. Its totient is φ = 20306416.

The previous prime is 20766073. The next prime is 20766101. The reversal of 20766089 is 98066702.

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 20766089 - 2⁴ = 20766073 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20762089) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24332 + ... + 25170.

It is an arithmetic number, because the mean of its divisors is an integer number (2653560).

Almost surely, 2^20766089 is an apocalyptic number.

It is an amenable number.

20766089 is a deficient number, since it is larger than the sum of its proper divisors (462391).

20766089 is an equidigital number, since it uses as much as digits as its factorization.

20766089 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1359.

The product of its (nonzero) digits is 36288, while the sum is 38.

The square root of 20766089 is about 4556.9824445569. The cubic root of 20766089 is about 274.8642371194.

The spelling of 20766089 in words is "twenty million, seven hundred sixty-six thousand, eighty-nine".