20748189 has 16 divisors (see below), whose sum is σ = 34490880. Its totient is φ = 10778160.

The previous prime is 20748179. The next prime is 20748191. The reversal of 20748189 is 98184702.

It is not a de Polignac number, because 20748189 - 2¹² = 20744093 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20748179) 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, 44679 + ... + 45140.

It is an arithmetic number, because the mean of its divisors is an integer number (2155680).

Almost surely, 2^20748189 is an apocalyptic number.

It is an amenable number.

20748189 is a deficient number, since it is larger than the sum of its proper divisors (13742691).

20748189 is a wasteful number, since it uses less digits than its factorization.

20748189 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89840.

The product of its (nonzero) digits is 32256, while the sum is 39.

The square root of 20748189 is about 4555.0180021598. The cubic root of 20748189 is about 274.7852383859.

The spelling of 20748189 in words is "twenty million, seven hundred forty-eight thousand, one hundred eighty-nine".