20425401 has 24 divisors (see below), whose sum is σ = 30476160. Its totient is φ = 13175136.

The previous prime is 20425397. The next prime is 20425417. The reversal of 20425401 is 10452402.

It is not a de Polignac number, because 20425401 - 2² = 20425397 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20425451) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 45886 + ... + 46328.

It is an arithmetic number, because the mean of its divisors is an integer number (1269840).

Almost surely, 2^20425401 is an apocalyptic number.

It is an amenable number.

20425401 is a deficient number, since it is larger than the sum of its proper divisors (10050759).

20425401 is a wasteful number, since it uses less digits than its factorization.

20425401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 605 (or 602 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 18.

The square root of 20425401 is about 4519.4469794434. The cubic root of 20425401 is about 273.3528023346.

Adding to 20425401 its reverse (10452402), we get a palindrome (30877803).

The spelling of 20425401 in words is "twenty million, four hundred twenty-five thousand, four hundred one".