20587986104 has 128 divisors (see below), whose sum is σ = 48845721600. Its totient is φ = 7936081920.

The previous prime is 20587986091. The next prime is 20587986131. The reversal of 20587986104 is 40168978502.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1742264 + ... + 1754040.

It is an arithmetic number, because the mean of its divisors is an integer number (381607200).

Almost surely, 2^20587986104 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 20587986104, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24422860800).

20587986104 is an abundant number, since it is smaller than the sum of its proper divisors (28257735496).

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

20587986104 is a wasteful number, since it uses less digits than its factorization.

20587986104 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11893 (or 11889 counting only the distinct ones).

The product of its (nonzero) digits is 967680, while the sum is 50.

The spelling of 20587986104 in words is "twenty billion, five hundred eighty-seven million, nine hundred eighty-six thousand, one hundred four".