20425072 has 40 divisors (see below), whose sum is σ = 40908096. Its totient is φ = 9874176.

The previous prime is 20425049. The next prime is 20425091. The reversal of 20425072 is 27052402.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 117978 + ... + 118150.

Almost surely, 2^20425072 is an apocalyptic number.

It is an amenable number.

20425072 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

20425072 is a wasteful number, since it uses less digits than its factorization.

20425072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 385 (or 379 counting only the distinct ones).

The product of its (nonzero) digits is 1120, while the sum is 22.

The square root of 20425072 is about 4519.4105810382. The cubic root of 20425072 is about 273.3513346595.

Adding to 20425072 its reverse (27052402), we get a palindrome (47477474).

The spelling of 20425072 in words is "twenty million, four hundred twenty-five thousand, seventy-two".