20557466366 has 16 divisors (see below), whose sum is σ = 32510636160. Its totient is φ = 9722303640.

The previous prime is 20557466357. The next prime is 20557466411. The reversal of 20557466366 is 66366475502.

It is a super-3 number, since 3×20557466366³ (a number of 32 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 404696 + ... + 452651.

It is an arithmetic number, because the mean of its divisors is an integer number (2031914760).

Almost surely, 2^20557466366 is an apocalyptic number.

20557466366 is a deficient number, since it is larger than the sum of its proper divisors (11953169794).

20557466366 is a wasteful number, since it uses less digits than its factorization.

20557466366 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 857999.

The product of its (nonzero) digits is 5443200, while the sum is 50.

The spelling of 20557466366 in words is "twenty billion, five hundred fifty-seven million, four hundred sixty-six thousand, three hundred sixty-six".