20425032231 has 4 divisors (see below), whose sum is σ = 27233376312. Its totient is φ = 13616688152.

The previous prime is 20425032223. The next prime is 20425032241. The reversal of 20425032231 is 13223052402.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20425032231 - 2³ = 20425032223 is a prime.

It is a super-3 number, since 3×20425032231³ (a number of 32 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20425032241) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3404172036 + ... + 3404172041.

It is an arithmetic number, because the mean of its divisors is an integer number (6808344078).

Almost surely, 2^20425032231 is an apocalyptic number.

20425032231 is a deficient number, since it is larger than the sum of its proper divisors (6808344081).

20425032231 is an equidigital number, since it uses as much as digits as its factorization.

20425032231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6808344080.

The product of its (nonzero) digits is 2880, while the sum is 24.

Adding to 20425032231 its reverse (13223052402), we get a palindrome (33648084633).

The spelling of 20425032231 in words is "twenty billion, four hundred twenty-five million, thirty-two thousand, two hundred thirty-one".