20368920166 has 32 divisors (see below), whose sum is σ = 35193312000. Its totient is φ = 8660833632.

The previous prime is 20368920163. The next prime is 20368920193. The reversal of 20368920166 is 66102986302.

It is a super-3 number, since 3×20368920166³ (a number of 32 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20368920163) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 4023745 + ... + 4028803.

It is an arithmetic number, because the mean of its divisors is an integer number (1099791000).

Almost surely, 2^20368920166 is an apocalyptic number.

20368920166 is a deficient number, since it is larger than the sum of its proper divisors (14824391834).

20368920166 is a wasteful number, since it uses less digits than its factorization.

20368920166 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7276.

The product of its (nonzero) digits is 186624, while the sum is 43.

The spelling of 20368920166 in words is "twenty billion, three hundred sixty-eight million, nine hundred twenty thousand, one hundred sixty-six".