20688619369 has 16 divisors (see below), whose sum is σ = 23106726720. Its totient is φ = 18360538560.

The previous prime is 20688619337. The next prime is 20688619373. The reversal of 20688619369 is 96391688602.

It is a cyclic number.

It is not a de Polignac number, because 20688619369 - 2⁵ = 20688619337 is a prime.

It is a super-2 number, since 2×20688619369² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20688614369) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 948939 + ... + 970495.

It is an arithmetic number, because the mean of its divisors is an integer number (1444170420).

Almost surely, 2^20688619369 is an apocalyptic number.

It is an amenable number.

20688619369 is a deficient number, since it is larger than the sum of its proper divisors (2418107351).

20688619369 is a wasteful number, since it uses less digits than its factorization.

20688619369 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23640.

The product of its (nonzero) digits is 6718464, while the sum is 58.

The spelling of 20688619369 in words is "twenty billion, six hundred eighty-eight million, six hundred nineteen thousand, three hundred sixty-nine".