20668459346 has 4 divisors (see below), whose sum is σ = 31002689022. Its totient is φ = 10334229672.

The previous prime is 20668459327. The next prime is 20668459351. The reversal of 20668459346 is 64395486602.

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

It can be written as a sum of positive squares in only one way, i.e., 17488740025 + 3179719321 = 132245^2 + 56389^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5167114835 + ... + 5167114838.

Almost surely, 2^20668459346 is an apocalyptic number.

20668459346 is a deficient number, since it is larger than the sum of its proper divisors (10334229676).

20668459346 is a wasteful number, since it uses less digits than its factorization.

20668459346 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10334229675.

The product of its (nonzero) digits is 7464960, while the sum is 53.

The spelling of 20668459346 in words is "twenty billion, six hundred sixty-eight million, four hundred fifty-nine thousand, three hundred forty-six".