20225131544 has 16 divisors (see below), whose sum is σ = 38101850520. Its totient is φ = 10064638080.

The previous prime is 20225131543. The next prime is 20225131579. The reversal of 20225131544 is 44513152202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20225131543) 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, 5989169 + ... + 5992544.

Almost surely, 2^20225131544 is an apocalyptic number.

It is an amenable number.

20225131544 is a deficient number, since it is larger than the sum of its proper divisors (17876718976).

20225131544 is a wasteful number, since it uses less digits than its factorization.

20225131544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11981930 (or 11981926 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 29.

Adding to 20225131544 its reverse (44513152202), we get a palindrome (64738283746).

The spelling of 20225131544 in words is "twenty billion, two hundred twenty-five million, one hundred thirty-one thousand, five hundred forty-four".