20452389 has 8 divisors (see below), whose sum is σ = 27615360. Its totient is φ = 13462176.

The previous prime is 20452363. The next prime is 20452427. The reversal of 20452389 is 98325402.

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 20452389 - 2⁵ = 20452357 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20450389) 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, 42912 + ... + 43385.

It is an arithmetic number, because the mean of its divisors is an integer number (3451920).

Almost surely, 2^20452389 is an apocalyptic number.

It is an amenable number.

20452389 is a deficient number, since it is larger than the sum of its proper divisors (7162971).

20452389 is an equidigital number, since it uses as much as digits as its factorization.

20452389 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86379.

The product of its (nonzero) digits is 17280, while the sum is 33.

The square root of 20452389 is about 4522.4317573624. The cubic root of 20452389 is about 273.4731426670.

The spelling of 20452389 in words is "twenty million, four hundred fifty-two thousand, three hundred eighty-nine".