20068914689 has 4 divisors (see below), whose sum is σ = 20760946260. Its totient is φ = 19376883120.

The previous prime is 20068914653. The next prime is 20068914703. The reversal of 20068914689 is 98641986002.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 7502504689 + 12566410000 = 86617^2 + 112100^2 .

It is a cyclic number.

It is not a de Polignac number, because 20068914689 - 2⁸ = 20068914433 is a prime.

It is a super-2 number, since 2×20068914689² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20068914689.

It is not an unprimeable number, because it can be changed into a prime (20068314689) 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, 346015742 + ... + 346015799.

It is an arithmetic number, because the mean of its divisors is an integer number (5190236565).

Almost surely, 2^20068914689 is an apocalyptic number.

20068914689 is a gapful number since it is divisible by the number (29) formed by its first and last digit.

It is an amenable number.

20068914689 is a deficient number, since it is larger than the sum of its proper divisors (692031571).

20068914689 is an equidigital number, since it uses as much as digits as its factorization.

20068914689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 692031570.

The product of its (nonzero) digits is 1492992, while the sum is 53.

The spelling of 20068914689 in words is "twenty billion, sixty-eight million, nine hundred fourteen thousand, six hundred eighty-nine".