20225105556 has 24 divisors (see below), whose sum is σ = 48289400544. Its totient is φ = 6584917920.

The previous prime is 20225105533. The next prime is 20225105561. The reversal of 20225105556 is 65550152202.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19597455 + ... + 19598486.

It is an arithmetic number, because the mean of its divisors is an integer number (2012058356).

Almost surely, 2^20225105556 is an apocalyptic number.

It is an amenable number.

20225105556 is an abundant number, since it is smaller than the sum of its proper divisors (28064294988).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20225105556 is a wasteful number, since it uses less digits than its factorization.

20225105556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39195991 (or 39195989 counting only the distinct ones).

The product of its (nonzero) digits is 30000, while the sum is 33.

Adding to 20225105556 its reverse (65550152202), we get a palindrome (85775257758).

The spelling of 20225105556 in words is "twenty billion, two hundred twenty-five million, one hundred five thousand, five hundred fifty-six".