20064631560 has 128 divisors (see below), whose sum is σ = 63410688000. Its totient is φ = 5065065216.

The previous prime is 20064631523. The next prime is 20064631583. The reversal of 20064631560 is 6513646002.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4008019 + ... + 4013021.

It is an arithmetic number, because the mean of its divisors is an integer number (495396000).

Almost surely, 2^20064631560 is an apocalyptic number.

20064631560 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20064631560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31705344000).

20064631560 is an abundant number, since it is smaller than the sum of its proper divisors (43346056440).

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

20064631560 is a wasteful number, since it uses less digits than its factorization.

20064631560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6795 (or 6791 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 33.

The spelling of 20064631560 in words is "twenty billion, sixty-four million, six hundred thirty-one thousand, five hundred sixty".