20121544352 has 192 divisors, whose sum is σ = 52215528960. Its totient is φ = 7406125056.

The previous prime is 20121544327. The next prime is 20121544357. The reversal of 20121544352 is 25344512102.

It is not an unprimeable number, because it can be changed into a prime (20121544357) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4403573 + ... + 4408139.

It is an arithmetic number, because the mean of its divisors is an integer number (271955880).

Almost surely, 2^20121544352 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 20121544352, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26107764480).

20121544352 is an abundant number, since it is smaller than the sum of its proper divisors (32093984608).

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

20121544352 is a wasteful number, since it uses less digits than its factorization.

20121544352 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4703 (or 4695 counting only the distinct ones).

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

The spelling of 20121544352 in words is "twenty billion, one hundred twenty-one million, five hundred forty-four thousand, three hundred fifty-two".