20683555556079 has 16 divisors (see below), whose sum is σ = 29756251156352. Its totient is φ = 12704004694368.

The previous prime is 20683555556051. The next prime is 20683555556123. The reversal of 20683555556079 is 97065555538602.

It is a happy number.

It is not a de Polignac number, because 20683555556079 - 2⁷ = 20683555555951 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20683555556029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 507004057 + ... + 507044850.

It is an arithmetic number, because the mean of its divisors is an integer number (1859765697272).

Almost surely, 2^{20683555556079} is an apocalyptic number.

20683555556079 is a deficient number, since it is larger than the sum of its proper divisors (9072695600273).

20683555556079 is a wasteful number, since it uses less digits than its factorization.

20683555556079 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1014049446.

The product of its (nonzero) digits is 340200000, while the sum is 66.

The spelling of 20683555556079 in words is "twenty trillion, six hundred eighty-three billion, five hundred fifty-five million, five hundred fifty-six thousand, seventy-nine".