20587985104 has 20 divisors (see below), whose sum is σ = 39896776800. Its totient is φ = 10292042720.

The previous prime is 20587985087. The next prime is 20587985111. The reversal of 20587985104 is 40158978502.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32782 + ... + 205549.

It is an arithmetic number, because the mean of its divisors is an integer number (1994838840).

Almost surely, 2^20587985104 is an apocalyptic number.

It is an amenable number.

20587985104 is a deficient number, since it is larger than the sum of its proper divisors (19308791696).

20587985104 is a wasteful number, since it uses less digits than its factorization.

20587985104 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 243738 (or 243732 counting only the distinct ones).

The product of its (nonzero) digits is 806400, while the sum is 49.

The spelling of 20587985104 in words is "twenty billion, five hundred eighty-seven million, nine hundred eighty-five thousand, one hundred four".