20425406 has 8 divisors (see below), whose sum is σ = 31466280. Its totient is φ = 9936648.

The previous prime is 20425397. The next prime is 20425417. The reversal of 20425406 is 60452402.

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

It is a plaindrome in base 16.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 137936 + ... + 138083.

It is an arithmetic number, because the mean of its divisors is an integer number (3933285).

Almost surely, 2^20425406 is an apocalyptic number.

20425406 is a deficient number, since it is larger than the sum of its proper divisors (11040874).

20425406 is a wasteful number, since it uses less digits than its factorization.

20425406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 276058.

The product of its (nonzero) digits is 1920, while the sum is 23.

The square root of 20425406 is about 4519.4475326084. The cubic root of 20425406 is about 273.3528246395.

Adding to 20425406 its reverse (60452402), we get a palindrome (80877808).

The spelling of 20425406 in words is "twenty million, four hundred twenty-five thousand, four hundred six".