20686016618373 has 16 divisors (see below), whose sum is σ = 27621761753600. Its totient is φ = 13770485915760.

The previous prime is 20686016618369. The next prime is 20686016618411. The reversal of 20686016618373 is 37381661068602.

It is not a de Polignac number, because 20686016618373 - 2² = 20686016618369 is a prime.

It is a super-2 number, since 2×20686016618373² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20686016618353) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5919978 + ... + 8741748.

It is an arithmetic number, because the mean of its divisors is an integer number (1726360109600).

Almost surely, 2^{20686016618373} is an apocalyptic number.

It is an amenable number.

20686016618373 is a deficient number, since it is larger than the sum of its proper divisors (6935745135227).

20686016618373 is a wasteful number, since it uses less digits than its factorization.

20686016618373 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2825352.

The product of its (nonzero) digits is 10450944, while the sum is 57.

The spelling of 20686016618373 in words is "twenty trillion, six hundred eighty-six billion, sixteen million, six hundred eighteen thousand, three hundred seventy-three".