20023389 has 16 divisors (see below), whose sum is σ = 30073600. Its totient is φ = 13164768.

The previous prime is 20023379. The next prime is 20023391. The reversal of 20023389 is 98332002.

It is not a de Polignac number, because 20023389 - 2¹¹ = 20021341 is a prime.

It is a super-2 number, since 2×20023389² = 801872214090642, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20023379) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3109 + ... + 7050.

It is an arithmetic number, because the mean of its divisors is an integer number (1879600).

Almost surely, 2^20023389 is an apocalyptic number.

It is an amenable number.

20023389 is a deficient number, since it is larger than the sum of its proper divisors (10050211).

20023389 is a wasteful number, since it uses less digits than its factorization.

20023389 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10241 (or 10235 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 27.

The square root of 20023389 is about 4474.7501606235. The cubic root of 20023389 is about 271.5475329615.

The spelling of 20023389 in words is "twenty million, twenty-three thousand, three hundred eighty-nine".