20889527 has 4 divisors (see below), whose sum is σ = 21096456. Its totient is φ = 20682600.

The previous prime is 20889521. The next prime is 20889551. The reversal of 20889527 is 72598802.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20889527 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20889521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 103313 + ... + 103514.

It is an arithmetic number, because the mean of its divisors is an integer number (5274114).

Almost surely, 2^20889527 is an apocalyptic number.

20889527 is a deficient number, since it is larger than the sum of its proper divisors (206929).

20889527 is a wasteful number, since it uses less digits than its factorization.

20889527 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 206928.

The product of its (nonzero) digits is 80640, while the sum is 41.

The square root of 20889527 is about 4570.5062082881. The cubic root of 20889527 is about 275.4077785056.

The spelling of 20889527 in words is "twenty million, eight hundred eighty-nine thousand, five hundred twenty-seven".