20347669906 has 16 divisors (see below), whose sum is σ = 30751524216. Its totient is φ = 10097197056.

The previous prime is 20347669889. The next prime is 20347669933. The reversal of 20347669906 is 60996674302.

It can be written as a sum of positive squares in 4 ways, for example, as 17957340025 + 2390329881 = 134005^2 + 48891^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1994290 + ... + 2004466.

Almost surely, 2^20347669906 is an apocalyptic number.

20347669906 is a deficient number, since it is larger than the sum of its proper divisors (10403854310).

20347669906 is a wasteful number, since it uses less digits than its factorization.

20347669906 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17613.

The product of its (nonzero) digits is 2939328, while the sum is 52.

The spelling of 20347669906 in words is "twenty billion, three hundred forty-seven million, six hundred sixty-nine thousand, nine hundred six".