20586809700 has 216 divisors, whose sum is σ = 68326876800. Its totient is φ = 5170072320.

The previous prime is 20586809671. The next prime is 20586809707. The reversal of 20586809700 is 790868502.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is not an unprimeable number, because it can be changed into a prime (20586809707) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 2954821 + ... + 2961779.

Almost surely, 2^20586809700 is an apocalyptic number.

20586809700 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 20586809700, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34163438400).

20586809700 is an abundant number, since it is smaller than the sum of its proper divisors (47740067100).

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

20586809700 is a wasteful number, since it uses less digits than its factorization.

20586809700 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7171 (or 7161 counting only the distinct ones).

The product of its (nonzero) digits is 241920, while the sum is 45.

The spelling of 20586809700 in words is "twenty billion, five hundred eighty-six million, eight hundred nine thousand, seven hundred".