20806247631068 has 12 divisors (see below), whose sum is σ = 36411381886992. Its totient is φ = 10402995663360.

The previous prime is 20806247631049. The next prime is 20806247631133. The reversal of 20806247631068 is 86013674260802.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31672280 + ... + 32322527.

It is an arithmetic number, because the mean of its divisors is an integer number (3034281823916).

Almost surely, 2^{20806247631068} is an apocalyptic number.

It is an amenable number.

20806247631068 is a deficient number, since it is larger than the sum of its proper divisors (15605134255924).

20806247631068 is a wasteful number, since it uses less digits than its factorization.

20806247631068 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64076092 (or 64076090 counting only the distinct ones).

The product of its (nonzero) digits is 4644864, while the sum is 53.

The spelling of 20806247631068 in words is "twenty trillion, eight hundred six billion, two hundred forty-seven million, six hundred thirty-one thousand, sixty-eight".