20542424679 has 72 divisors (see below), whose sum is σ = 35151498720. Its totient is φ = 11315946240.

The previous prime is 20542424663. The next prime is 20542424681. The reversal of 20542424679 is 97642424502.

20542424679 is a `hidden beast` number, since 2 + 0 + 542 + 42 + 4 + 67 + 9 = 666.

It is not a de Polignac number, because 20542424679 - 2⁴ = 20542424663 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20542423679) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 76365757 + ... + 76366025.

It is an arithmetic number, because the mean of its divisors is an integer number (488215260).

Almost surely, 2^20542424679 is an apocalyptic number.

20542424679 is a deficient number, since it is larger than the sum of its proper divisors (14609074041).

20542424679 is a wasteful number, since it uses less digits than its factorization.

20542424679 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 681 (or 497 counting only the distinct ones).

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

The spelling of 20542424679 in words is "twenty billion, five hundred forty-two million, four hundred twenty-four thousand, six hundred seventy-nine".