20425039 has 4 divisors (see below), whose sum is σ = 20468160. Its totient is φ = 20381920.

The previous prime is 20425021. The next prime is 20425049. The reversal of 20425039 is 93052402.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 93052402 = 2 ⋅46526201.

It is a cyclic number.

It is not a de Polignac number, because 20425039 - 2¹⁵ = 20392271 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 (20425049) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20842 + ... + 21799.

It is an arithmetic number, because the mean of its divisors is an integer number (5117040).

Almost surely, 2^20425039 is an apocalyptic number.

20425039 is a deficient number, since it is larger than the sum of its proper divisors (43121).

20425039 is an equidigital number, since it uses as much as digits as its factorization.

20425039 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43120.

The product of its (nonzero) digits is 2160, while the sum is 25.

The square root of 20425039 is about 4519.4069301182. The cubic root of 20425039 is about 273.3511874450.

The spelling of 20425039 in words is "twenty million, four hundred twenty-five thousand, thirty-nine".