19701723707860 has 12 divisors (see below), whose sum is σ = 41373619786548. Its totient is φ = 7880689483136.

The previous prime is 19701723707849. The next prime is 19701723707867. The reversal of 19701723707860 is 6870732710791.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 9802985664784 + 9898738043076 = 3130972^2 + 3146226^2 .

It is a junction number, because it is equal to n+sod(n) for n = 19701723707795 and 19701723707804.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19701723707867) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 492543092677 + ... + 492543092716.

It is an arithmetic number, because the mean of its divisors is an integer number (3447801648879).

Almost surely, 2^{19701723707860} is an apocalyptic number.

19701723707860 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

19701723707860 is an abundant number, since it is smaller than the sum of its proper divisors (21671896078688).

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

19701723707860 is a wasteful number, since it uses less digits than its factorization.

19701723707860 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 985086185402 (or 985086185400 counting only the distinct ones).

The product of its (nonzero) digits is 6223392, while the sum is 58.

The spelling of 19701723707860 in words is "nineteen trillion, seven hundred one billion, seven hundred twenty-three million, seven hundred seven thousand, eight hundred sixty".