20425023 has 6 divisors (see below), whose sum is σ = 29502824. Its totient is φ = 13616676.

The previous prime is 20425021. The next prime is 20425049. The reversal of 20425023 is 32052402.

It is not a de Polignac number, because 20425023 - 2¹ = 20425021 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20424987 and 20425005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20425021) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1134715 + ... + 1134732.

Almost surely, 2^20425023 is an apocalyptic number.

20425023 is a deficient number, since it is larger than the sum of its proper divisors (9077801).

20425023 is a wasteful number, since it uses less digits than its factorization.

20425023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2269453 (or 2269450 counting only the distinct ones).

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

The square root of 20425023 is about 4519.4051599740. The cubic root of 20425023 is about 273.3511160682.

Adding to 20425023 its reverse (32052402), we get a palindrome (52477425).

The spelling of 20425023 in words is "twenty million, four hundred twenty-five thousand, twenty-three".