20366138768 has 20 divisors (see below), whose sum is σ = 39585471948. Its totient is φ = 10150533120.

The previous prime is 20366138729. The next prime is 20366138791. The reversal of 20366138768 is 86783166302.

It can be written as a sum of positive squares in 2 ways, for example, as 147573904 + 20218564864 = 12148^2 + 142192^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2028353 + ... + 2038368.

Almost surely, 2^20366138768 is an apocalyptic number.

It is an amenable number.

20366138768 is a deficient number, since it is larger than the sum of its proper divisors (19219333180).

20366138768 is a wasteful number, since it uses less digits than its factorization.

20366138768 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4067042 (or 4067036 counting only the distinct ones).

The product of its (nonzero) digits is 1741824, while the sum is 50.

The spelling of 20366138768 in words is "twenty billion, three hundred sixty-six million, one hundred thirty-eight thousand, seven hundred sixty-eight".