20771144445 has 8 divisors (see below), whose sum is σ = 33233831136. Its totient is φ = 11077943696.

The previous prime is 20771144423. The next prime is 20771144447. The reversal of 20771144445 is 54444117702.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20771144445 - 2⁸ = 20771144189 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20771144447) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 692371467 + ... + 692371496.

It is an arithmetic number, because the mean of its divisors is an integer number (4154228892).

Almost surely, 2^20771144445 is an apocalyptic number.

It is an amenable number.

20771144445 is a deficient number, since it is larger than the sum of its proper divisors (12462686691).

20771144445 is a wasteful number, since it uses less digits than its factorization.

20771144445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1384742971.

The product of its (nonzero) digits is 125440, while the sum is 39.

The spelling of 20771144445 in words is "twenty billion, seven hundred seventy-one million, one hundred forty-four thousand, four hundred forty-five".