20425017 has 16 divisors (see below), whose sum is σ = 27813632. Its totient is φ = 13329360.

The previous prime is 20424983. The next prime is 20425021. The reversal of 20425017 is 71052402.

It is not a de Polignac number, because 20425017 - 2¹² = 20420921 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20424984 and 20425002.

It is not an unprimeable number, because it can be changed into a prime (20425117) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 61542 + ... + 61872.

It is an arithmetic number, because the mean of its divisors is an integer number (1738352).

Almost surely, 2^20425017 is an apocalyptic number.

It is an amenable number.

20425017 is a deficient number, since it is larger than the sum of its proper divisors (7388615).

20425017 is a wasteful number, since it uses less digits than its factorization.

20425017 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 708.

The product of its (nonzero) digits is 560, while the sum is 21.

The square root of 20425017 is about 4519.4044961698. The cubic root of 20425017 is about 273.3510893019.

Adding to 20425017 its reverse (71052402), we get a palindrome (91477419).

The spelling of 20425017 in words is "twenty million, four hundred twenty-five thousand, seventeen".