20242550556 has 72 divisors (see below), whose sum is σ = 54542451600. Its totient is φ = 6307954176.

The previous prime is 20242550519. The next prime is 20242550561. The reversal of 20242550556 is 65505524202.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 20242550556.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 19806 + ... + 202181.

It is an arithmetic number, because the mean of its divisors is an integer number (757534050).

Almost surely, 2^20242550556 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20242550556, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27271225800).

20242550556 is an abundant number, since it is smaller than the sum of its proper divisors (34299901044).

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

20242550556 is a wasteful number, since it uses less digits than its factorization.

20242550556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 222163 (or 222158 counting only the distinct ones).

The product of its (nonzero) digits is 120000, while the sum is 36.

The spelling of 20242550556 in words is "twenty billion, two hundred forty-two million, five hundred fifty thousand, five hundred fifty-six".