20423025 has 36 divisors (see below), whose sum is σ = 41808832. Its totient is φ = 9335520.

The previous prime is 20423023. The next prime is 20423041. The reversal of 20423025 is 52032402.

It is not a de Polignac number, because 20423025 - 2¹ = 20423023 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 20422989 and 20423007.

It is not an unprimeable number, because it can be changed into a prime (20423023) by changing a digit.

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 35 ways as a sum of consecutive naturals, for example, 4909 + ... + 8058.

Almost surely, 2^20423025 is an apocalyptic number.

20423025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20423025 is an abundant number, since it is smaller than the sum of its proper divisors (21385807).

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

20423025 is a wasteful number, since it uses less digits than its factorization.

20423025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12990 (or 12982 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 18.

The square root of 20423025 is about 4519.1841077787. The cubic root of 20423025 is about 273.3422026007.

Adding to 20423025 its reverse (52032402), we get a palindrome (72455427).

The spelling of 20423025 in words is "twenty million, four hundred twenty-three thousand, twenty-five".