20425444 has 24 divisors (see below), whose sum is σ = 38864448. Its totient is φ = 9336480.

The previous prime is 20425429. The next prime is 20425451. The reversal of 20425444 is 44452402.

It is a happy 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, 3729 + ... + 7399.

It is an arithmetic number, because the mean of its divisors is an integer number (1619352).

Almost surely, 2^20425444 is an apocalyptic number.

It is an amenable number.

20425444 is a deficient number, since it is larger than the sum of its proper divisors (18439004).

20425444 is a wasteful number, since it uses less digits than its factorization.

20425444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3795 (or 3793 counting only the distinct ones).

The product of its (nonzero) digits is 5120, while the sum is 25.

The square root of 20425444 is about 4519.4517366601. The cubic root of 20425444 is about 273.3529941572.

Adding to 20425444 its reverse (44452402), we get a palindrome (64877846).

The spelling of 20425444 in words is "twenty million, four hundred twenty-five thousand, four hundred forty-four".