20977670550108 has 24 divisors (see below), whose sum is σ = 49537631662848. Its totient is φ = 6908309176816.

The previous prime is 20977670550097. The next prime is 20977670550121. The reversal of 20977670550108 is 80105507677902.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10530958116 + ... + 10530960107.

It is an arithmetic number, because the mean of its divisors is an integer number (2064067985952).

Almost surely, 2^{20977670550108} is an apocalyptic number.

It is an amenable number.

20977670550108 is an abundant number, since it is smaller than the sum of its proper divisors (28559961112740).

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

20977670550108 is a wasteful number, since it uses less digits than its factorization.

20977670550108 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21061918313 (or 21061918311 counting only the distinct ones).

The product of its (nonzero) digits is 7408800, while the sum is 57.

The spelling of 20977670550108 in words is "twenty trillion, nine hundred seventy-seven billion, six hundred seventy million, five hundred fifty thousand, one hundred eight".