20771160444 has 36 divisors (see below), whose sum is σ = 52656220344. Its totient is φ = 6903762912.

The previous prime is 20771160409. The next prime is 20771160461. The reversal of 20771160444 is 44406117702.

It is a happy number.

20771160444 is a `hidden beast` number, since 2 + 0 + 7 + 7 + 1 + 1 + 604 + 44 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-2 number, since 2×20771160444² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 20771160399 and 20771160408.

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 11 ways as a sum of consecutive naturals, for example, 818887 + ... + 843870.

Almost surely, 2^20771160444 is an apocalyptic number.

It is an amenable number.

20771160444 is an abundant number, since it is smaller than the sum of its proper divisors (31885059900).

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

20771160444 is a wasteful number, since it uses less digits than its factorization.

20771160444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1663114 (or 1663109 counting only the distinct ones).

The product of its (nonzero) digits is 37632, while the sum is 36.

The spelling of 20771160444 in words is "twenty billion, seven hundred seventy-one million, one hundred sixty thousand, four hundred forty-four".