20566356700 has 18 divisors (see below), whose sum is σ = 44628994256. Its totient is φ = 8226542640.

The previous prime is 20566356697. The next prime is 20566356709. The reversal of 20566356700 is 765366502.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20566356709) by changing a digit.

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 5 ways as a sum of consecutive naturals, for example, 102831684 + ... + 102831883.

Almost surely, 2^20566356700 is an apocalyptic number.

20566356700 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20566356700 is an abundant number, since it is smaller than the sum of its proper divisors (24062637556).

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

20566356700 is a wasteful number, since it uses less digits than its factorization.

20566356700 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 205663581 (or 205663574 counting only the distinct ones).

The product of its (nonzero) digits is 226800, while the sum is 40.

The spelling of 20566356700 in words is "twenty billion, five hundred sixty-six million, three hundred fifty-six thousand, seven hundred".