20743389 has 12 divisors (see below), whose sum is σ = 30063072. Its totient is φ = 13782600.

The previous prime is 20743369. The next prime is 20743391. The reversal of 20743389 is 98334702.

It is not a de Polignac number, because 20743389 - 2⁵ = 20743357 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20743369) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 907 + ... + 6504.

It is an arithmetic number, because the mean of its divisors is an integer number (2505256).

Almost surely, 2^20743389 is an apocalyptic number.

It is an amenable number.

20743389 is a deficient number, since it is larger than the sum of its proper divisors (9319683).

20743389 is a wasteful number, since it uses less digits than its factorization.

20743389 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7728 (or 7725 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 36.

The square root of 20743389 is about 4554.4910802416. The cubic root of 20743389 is about 274.7640466429.

The spelling of 20743389 in words is "twenty million, seven hundred forty-three thousand, three hundred eighty-nine".