20744179057 has 6 divisors (see below), whose sum is σ = 24130983858. Its totient is φ = 17780724864.

The previous prime is 20744179039. The next prime is 20744179061. The reversal of 20744179057 is 75097144702.

It can be written as a sum of positive squares in only one way, i.e., 20656588176 + 87590881 = 143724^2 + 9359^2 .

It is not a de Polignac number, because 20744179057 - 2¹¹ = 20744177009 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20744178998 and 20744179016.

It is not an unprimeable number, because it can be changed into a prime (20744179037) 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 5 ways as a sum of consecutive naturals, for example, 211675248 + ... + 211675345.

It is an arithmetic number, because the mean of its divisors is an integer number (4021830643).

Almost surely, 2^20744179057 is an apocalyptic number.

It is an amenable number.

20744179057 is a deficient number, since it is larger than the sum of its proper divisors (3386804801).

20744179057 is an equidigital number, since it uses as much as digits as its factorization.

20744179057 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 423350607 (or 423350600 counting only the distinct ones).

The product of its (nonzero) digits is 493920, while the sum is 46.

The spelling of 20744179057 in words is "twenty billion, seven hundred forty-four million, one hundred seventy-nine thousand, fifty-seven".