20425385 has 8 divisors (see below), whose sum is σ = 24579456. Its totient is φ = 16294320.

The previous prime is 20425343. The next prime is 20425397. The reversal of 20425385 is 58352402.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 20425385 - 2¹⁴ = 20409001 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3731 + ... + 7400.

It is an arithmetic number, because the mean of its divisors is an integer number (3072432).

Almost surely, 2^20425385 is an apocalyptic number.

It is an amenable number.

20425385 is a deficient number, since it is larger than the sum of its proper divisors (4154071).

20425385 is a wasteful number, since it uses less digits than its factorization.

20425385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11503.

The product of its (nonzero) digits is 9600, while the sum is 29.

The square root of 20425385 is about 4519.4452093150. The cubic root of 20425385 is about 273.3527309586.

Adding to 20425385 its reverse (58352402), we get a palindrome (78777787).

The spelling of 20425385 in words is "twenty million, four hundred twenty-five thousand, three hundred eighty-five".