20425005031 has 16 divisors (see below), whose sum is σ = 22398165504. Its totient is φ = 18566833824.

The previous prime is 20425005019. The next prime is 20425005047. The reversal of 20425005031 is 13050052402.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20425005031 is a prime.

It is a super-3 number, since 3×20425005031³ (a number of 32 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20425004993 and 20425005011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20425005001) 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, 242491 + ... + 315676.

It is an arithmetic number, because the mean of its divisors is an integer number (1399885344).

Almost surely, 2^20425005031 is an apocalyptic number.

20425005031 is a deficient number, since it is larger than the sum of its proper divisors (1973160473).

20425005031 is a wasteful number, since it uses less digits than its factorization.

20425005031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 558270.

The product of its (nonzero) digits is 1200, while the sum is 22.

Adding to 20425005031 its reverse (13050052402), we get a palindrome (33475057433).

The spelling of 20425005031 in words is "twenty billion, four hundred twenty-five million, five thousand, thirty-one".