20557773236366 has 32 divisors (see below), whose sum is σ = 32390752546656. Its totient is φ = 9776495232000.

The previous prime is 20557773236359. The next prime is 20557773236411. The reversal of 20557773236366 is 66363237775502.

It is a junction number, because it is equal to n+sod(n) for n = 20557773236299 and 20557773236308.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17620220 + ... + 18750671.

It is an arithmetic number, because the mean of its divisors is an integer number (1012211017083).

Almost surely, 2^{20557773236366} is an apocalyptic number.

20557773236366 is a deficient number, since it is larger than the sum of its proper divisors (11832979310290).

20557773236366 is a wasteful number, since it uses less digits than its factorization.

20557773236366 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36371108.

The product of its (nonzero) digits is 200037600, while the sum is 62.

The spelling of 20557773236366 in words is "twenty trillion, five hundred fifty-seven billion, seven hundred seventy-three million, two hundred thirty-six thousand, three hundred sixty-six".