20905363700 has 144 divisors (see below), whose sum is σ = 51803976000. Its totient is φ = 7258844160.

The previous prime is 20905363693. The next prime is 20905363723. The reversal of 20905363700 is 736350902.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 3430256 + ... + 3436344.

Almost surely, 2^20905363700 is an apocalyptic number.

20905363700 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 20905363700, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25901988000).

20905363700 is an abundant number, since it is smaller than the sum of its proper divisors (30898612300).

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

20905363700 is a wasteful number, since it uses less digits than its factorization.

20905363700 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6274 (or 6267 counting only the distinct ones).

The product of its (nonzero) digits is 34020, while the sum is 35.

The spelling of 20905363700 in words is "twenty billion, nine hundred five million, three hundred sixty-three thousand, seven hundred".