20712434689800 has 144 divisors (see below), whose sum is σ = 79496297000640. Its totient is φ = 4734270783360.

The previous prime is 20712434689799. The next prime is 20712434689829. The reversal of 20712434689800 is 898643421702.

20712434689800 is a `hidden beast` number, since 2 + 0 + 71 + 2 + 434 + 68 + 9 + 80 + 0 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 821909412 + ... + 821934611.

It is an arithmetic number, because the mean of its divisors is an integer number (552057618060).

Almost surely, 2^{20712434689800} is an apocalyptic number.

20712434689800 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20712434689800 is an abundant number, since it is smaller than the sum of its proper divisors (58783862310840).

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

20712434689800 is a wasteful number, since it uses less digits than its factorization.

20712434689800 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1643844052 (or 1643844040 counting only the distinct ones).

The product of its (nonzero) digits is 4644864, while the sum is 54.

The spelling of 20712434689800 in words is "twenty trillion, seven hundred twelve billion, four hundred thirty-four million, six hundred eighty-nine thousand, eight hundred".