20089457 has 4 divisors (see below), whose sum is σ = 20737536. Its totient is φ = 19441380.

The previous prime is 20089451. The next prime is 20089477. The reversal of 20089457 is 75498002.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 20089457 - 2¹⁰ = 20088433 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20089451) 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 3 ways as a sum of consecutive naturals, for example, 323993 + ... + 324054.

It is an arithmetic number, because the mean of its divisors is an integer number (5184384).

Almost surely, 2^20089457 is an apocalyptic number.

It is an amenable number.

20089457 is a deficient number, since it is larger than the sum of its proper divisors (648079).

20089457 is an equidigital number, since it uses as much as digits as its factorization.

20089457 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 648078.

The product of its (nonzero) digits is 20160, while the sum is 35.

The square root of 20089457 is about 4482.1263926846. The cubic root of 20089457 is about 271.8458658524.

The spelling of 20089457 in words is "twenty million, eighty-nine thousand, four hundred fifty-seven".