20544440679 has 36 divisors (see below), whose sum is σ = 34762172848. Its totient is φ = 11453287680.

The previous prime is 20544440671. The next prime is 20544440699. The reversal of 20544440679 is 97604444502.

20544440679 is a `hidden beast` number, since 2 + 0 + 544 + 4 + 40 + 67 + 9 = 666.

It is not a de Polignac number, because 20544440679 - 2³ = 20544440671 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20544440671) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 8907 + ... + 202899.

Almost surely, 2^20544440679 is an apocalyptic number.

20544440679 is a deficient number, since it is larger than the sum of its proper divisors (14217732169).

20544440679 is a wasteful number, since it uses less digits than its factorization.

20544440679 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 194088 (or 194044 counting only the distinct ones).

The product of its (nonzero) digits is 967680, while the sum is 45.

The spelling of 20544440679 in words is "twenty billion, five hundred forty-four million, four hundred forty thousand, six hundred seventy-nine".