20712235068820 has 12 divisors (see below), whose sum is σ = 43495693644564. Its totient is φ = 8284894027520.

The previous prime is 20712235068787. The next prime is 20712235068853. The reversal of 20712235068820 is 2886053221702.

It is an interprime number because it is at equal distance from previous prime (20712235068787) and next prime (20712235068853).

It can be written as a sum of positive squares in 2 ways, for example, as 8118920794384 + 12593314274436 = 2849372^2 + 3548706^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 517805876701 + ... + 517805876740.

It is an arithmetic number, because the mean of its divisors is an integer number (3624641137047).

Almost surely, 2^{20712235068820} is an apocalyptic number.

20712235068820 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20712235068820 is an abundant number, since it is smaller than the sum of its proper divisors (22783458575744).

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

20712235068820 is a wasteful number, since it uses less digits than its factorization.

20712235068820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1035611753450 (or 1035611753448 counting only the distinct ones).

The product of its (nonzero) digits is 645120, while the sum is 46.

The spelling of 20712235068820 in words is "twenty trillion, seven hundred twelve billion, two hundred thirty-five million, sixty-eight thousand, eight hundred twenty".