20747089 has 8 divisors (see below), whose sum is σ = 23964768. Its totient is φ = 17751360.

The previous prime is 20747087. The next prime is 20747131. The reversal of 20747089 is 98074702.

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 20747089 - 2¹ = 20747087 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20747087) 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, 55287 + ... + 55660.

It is an arithmetic number, because the mean of its divisors is an integer number (2995596).

Almost surely, 2^20747089 is an apocalyptic number.

It is an amenable number.

20747089 is a deficient number, since it is larger than the sum of its proper divisors (3217679).

20747089 is a wasteful number, since it uses less digits than its factorization.

20747089 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110975.

The product of its (nonzero) digits is 28224, while the sum is 37.

The square root of 20747089 is about 4554.8972546041. The cubic root of 20747089 is about 274.7803822335.

The spelling of 20747089 in words is "twenty million, seven hundred forty-seven thousand, eighty-nine".