20627179539 has 16 divisors (see below), whose sum is σ = 28789247232. Its totient is φ = 13112055968.

The previous prime is 20627179471. The next prime is 20627179577. The reversal of 20627179539 is 93597172602.

It is a cyclic number.

It is not a de Polignac number, because 20627179539 - 2¹⁷ = 20627048467 is a prime.

It is a super-4 number, since 4×20627179539⁴ (a number of 42 digits) contains 4444 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20627179491 and 20627179500.

It is not an unprimeable number, because it can be changed into a prime (20627179579) 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 15 ways as a sum of consecutive naturals, for example, 449649 + ... + 493394.

It is an arithmetic number, because the mean of its divisors is an integer number (1799327952).

Almost surely, 2^20627179539 is an apocalyptic number.

20627179539 is a deficient number, since it is larger than the sum of its proper divisors (8162067693).

20627179539 is a wasteful number, since it uses less digits than its factorization.

20627179539 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 943386.

The product of its (nonzero) digits is 1428840, while the sum is 51.

The spelling of 20627179539 in words is "twenty billion, six hundred twenty-seven million, one hundred seventy-nine thousand, five hundred thirty-nine".