20258389 has 4 divisors (see below), whose sum is σ = 21324640. Its totient is φ = 19192140.

The previous prime is 20258383. The next prime is 20258401. The reversal of 20258389 is 98385202.

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 20258389 - 2⁷ = 20258261 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20258383) 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 3 ways as a sum of consecutive naturals, for example, 533097 + ... + 533134.

It is an arithmetic number, because the mean of its divisors is an integer number (5331160).

Almost surely, 2^20258389 is an apocalyptic number.

It is an amenable number.

20258389 is a deficient number, since it is larger than the sum of its proper divisors (1066251).

20258389 is a wasteful number, since it uses less digits than its factorization.

20258389 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1066250.

The product of its (nonzero) digits is 34560, while the sum is 37.

The square root of 20258389 is about 4500.9320145943. The cubic root of 20258389 is about 272.6057228016.

The spelling of 20258389 in words is "twenty million, two hundred fifty-eight thousand, three hundred eighty-nine".