20688516343 has 8 divisors (see below), whose sum is σ = 22571752320. Its totient is φ = 18805690680.

The previous prime is 20688516313. The next prime is 20688516371. The reversal of 20688516343 is 34361588602.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20688516343 - 2¹³ = 20688508151 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20688516293 and 20688516302.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20688516313) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8046 + ... + 203572.

It is an arithmetic number, because the mean of its divisors is an integer number (2821469040).

Almost surely, 2^20688516343 is an apocalyptic number.

20688516343 is a deficient number, since it is larger than the sum of its proper divisors (1883235977).

20688516343 is a wasteful number, since it uses less digits than its factorization.

20688516343 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 205157.

The product of its (nonzero) digits is 829440, while the sum is 46.

The spelling of 20688516343 in words is "twenty billion, six hundred eighty-eight million, five hundred sixteen thousand, three hundred forty-three".