106820771920 has 20 divisors (see below), whose sum is σ = 248358294900. Its totient is φ = 42728308736.

The previous prime is 106820771903. The next prime is 106820771933. The reversal of 106820771920 is 29177028601.

It can be written as a sum of positive squares in 2 ways, for example, as 60616409616 + 46204362304 = 246204^2 + 214952^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a super-2 number, since 2×106820771920² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 667629745 + ... + 667629904.

It is an arithmetic number, because the mean of its divisors is an integer number (12417914745).

Almost surely, 2^106820771920 is an apocalyptic number.

106820771920 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

106820771920 is an abundant number, since it is smaller than the sum of its proper divisors (141537522980).

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

106820771920 is a wasteful number, since it uses less digits than its factorization.

106820771920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1335259662 (or 1335259656 counting only the distinct ones).

The product of its (nonzero) digits is 84672, while the sum is 43.

The spelling of 106820771920 in words is "one hundred six billion, eight hundred twenty million, seven hundred seventy-one thousand, nine hundred twenty".