20144006771 has 12 divisors (see below), whose sum is σ = 23469996240. Its totient is φ = 17238901680.

The previous prime is 20144006723. The next prime is 20144006797. The reversal of 20144006771 is 17760044102.

It is a de Polignac number, because none of the positive numbers 2^k-20144006771 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20144006171) by changing a digit.

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, 294836 + ... + 356673.

It is an arithmetic number, because the mean of its divisors is an integer number (1955833020).

Almost surely, 2^20144006771 is an apocalyptic number.

20144006771 is a deficient number, since it is larger than the sum of its proper divisors (3325989469).

20144006771 is an equidigital number, since it uses as much as digits as its factorization.

20144006771 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 652154 (or 652147 counting only the distinct ones).

The product of its (nonzero) digits is 9408, while the sum is 32.

The spelling of 20144006771 in words is "twenty billion, one hundred forty-four million, six thousand, seven hundred seventy-one".