20187047552 has 128 divisors (see below), whose sum is σ = 47662560000. Its totient is φ = 8332886016.

The previous prime is 20187047527. The next prime is 20187047563. The reversal of 20187047552 is 25574078102.

It is a tau number, because it is divible by the number of its divisors (128).

It is an unprimeable number.

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, 15563768 + ... + 15565064.

It is an arithmetic number, because the mean of its divisors is an integer number (372363750).

Almost surely, 2^20187047552 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 20187047552, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23831280000).

20187047552 is an abundant number, since it is smaller than the sum of its proper divisors (27475512448).

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

20187047552 is a wasteful number, since it uses less digits than its factorization.

20187047552 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1946 (or 1934 counting only the distinct ones).

The product of its (nonzero) digits is 156800, while the sum is 41.

The spelling of 20187047552 in words is "twenty billion, one hundred eighty-seven million, forty-seven thousand, five hundred fifty-two".