20848125139 has 4 divisors (see below), whose sum is σ = 20849011560. Its totient is φ = 20847238720.

The previous prime is 20848125131. The next prime is 20848125161. The reversal of 20848125139 is 93152184802.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 93152184802 = 2 ⋅46576092401.

It is a cyclic number.

It is not a de Polignac number, because 20848125139 - 2³ = 20848125131 is a prime.

It is a super-2 number, since 2×20848125139² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20848125095 and 20848125104.

It is not an unprimeable number, because it can be changed into a prime (20848125131) 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 3 ways as a sum of consecutive naturals, for example, 406942 + ... + 455299.

It is an arithmetic number, because the mean of its divisors is an integer number (5212252890).

Almost surely, 2^20848125139 is an apocalyptic number.

20848125139 is a deficient number, since it is larger than the sum of its proper divisors (886421).

20848125139 is an equidigital number, since it uses as much as digits as its factorization.

20848125139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 886420.

The product of its (nonzero) digits is 138240, while the sum is 43.

The spelling of 20848125139 in words is "twenty billion, eight hundred forty-eight million, one hundred twenty-five thousand, one hundred thirty-nine".