20589986508 has 48 divisors (see below), whose sum is σ = 59130220800. Its totient is φ = 5430325824.

The previous prime is 20589986489. The next prime is 20589986533. The reversal of 20589986508 is 80568998502.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9426558 + ... + 9428741.

It is an arithmetic number, because the mean of its divisors is an integer number (1231879600).

Almost surely, 2^20589986508 is an apocalyptic number.

20589986508 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

20589986508 is an abundant number, since it is smaller than the sum of its proper divisors (38540234292).

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

20589986508 is a wasteful number, since it uses less digits than its factorization.

20589986508 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18855326 (or 18855324 counting only the distinct ones).

The product of its (nonzero) digits is 12441600, while the sum is 60.

The spelling of 20589986508 in words is "twenty billion, five hundred eighty-nine million, nine hundred eighty-six thousand, five hundred eight".