20422525231 has 4 divisors (see below), whose sum is σ = 21497395000. Its totient is φ = 19347655464.

The previous prime is 20422525229. The next prime is 20422525237. The reversal of 20422525231 is 13252522402.

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

It is not a de Polignac number, because 20422525231 - 2¹ = 20422525229 is a prime.

It is a super-2 number, since 2×20422525231² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20422525231.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20422525237) 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, 537434856 + ... + 537434893.

It is an arithmetic number, because the mean of its divisors is an integer number (5374348750).

Almost surely, 2^20422525231 is an apocalyptic number.

20422525231 is a deficient number, since it is larger than the sum of its proper divisors (1074869769).

20422525231 is a wasteful number, since it uses less digits than its factorization.

20422525231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1074869768.

The product of its (nonzero) digits is 9600, while the sum is 28.

The spelling of 20422525231 in words is "twenty billion, four hundred twenty-two million, five hundred twenty-five thousand, two hundred thirty-one".