20195955552 has 96 divisors (see below), whose sum is σ = 55389374208. Its totient is φ = 6431141376.

The previous prime is 20195955499. The next prime is 20195955557. The reversal of 20195955552 is 25555959102.

It is a tau number, because it is divible by the number of its divisors (96).

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20195955557) 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 15 ways as a sum of consecutive naturals, for example, 1878063 + ... + 1888785.

It is an arithmetic number, because the mean of its divisors is an integer number (576972648).

Almost surely, 2^20195955552 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 20195955552, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27694687104).

20195955552 is an abundant number, since it is smaller than the sum of its proper divisors (35193418656).

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

20195955552 is a wasteful number, since it uses less digits than its factorization.

20195955552 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11612 (or 11604 counting only the distinct ones).

The product of its (nonzero) digits is 1012500, while the sum is 48.

The spelling of 20195955552 in words is "twenty billion, one hundred ninety-five million, nine hundred fifty-five thousand, five hundred fifty-two".