20676157566 has 32 divisors (see below), whose sum is σ = 42376672800. Its totient is φ = 6721451520.

The previous prime is 20676157549. The next prime is 20676157597. The reversal of 20676157566 is 66575167602.

20676157566 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

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, 716220 + ... + 744528.

It is an arithmetic number, because the mean of its divisors is an integer number (1324271025).

Almost surely, 2^20676157566 is an apocalyptic number.

20676157566 is an abundant number, since it is smaller than the sum of its proper divisors (21700515234).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20676157566 is a wasteful number, since it uses less digits than its factorization.

20676157566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31324.

The product of its (nonzero) digits is 3175200, while the sum is 51.

The spelling of 20676157566 in words is "twenty billion, six hundred seventy-six million, one hundred fifty-seven thousand, five hundred sixty-six".