20425146 has 16 divisors (see below), whose sum is σ = 46686144. Its totient is φ = 5835744.

The previous prime is 20425121. The next prime is 20425159. The reversal of 20425146 is 64152402.

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, 243115 + ... + 243198.

It is an arithmetic number, because the mean of its divisors is an integer number (2917884).

Almost surely, 2^20425146 is an apocalyptic number.

20425146 is an abundant number, since it is smaller than the sum of its proper divisors (26260998).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20425146 is a wasteful number, since it uses less digits than its factorization.

20425146 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 486325.

The product of its (nonzero) digits is 1920, while the sum is 24.

The square root of 20425146 is about 4519.4187679391. The cubic root of 20425146 is about 273.3516647762.

Adding to 20425146 its reverse (64152402), we get a palindrome (84577548).

The spelling of 20425146 in words is "twenty million, four hundred twenty-five thousand, one hundred forty-six".