20469122139 has 8 divisors (see below), whose sum is σ = 27872847360. Its totient is φ = 13355739176.

The previous prime is 20469122111. The next prime is 20469122173. The reversal of 20469122139 is 93122196402.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20469122139 - 2⁹ = 20469121627 is a prime.

It is a super-2 number, since 2×20469122139² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20469122097 and 20469122106.

It is not an unprimeable number, because it can be changed into a prime (20469122239) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 72585399 + ... + 72585680.

It is an arithmetic number, because the mean of its divisors is an integer number (3484105920).

Almost surely, 2^20469122139 is an apocalyptic number.

20469122139 is a deficient number, since it is larger than the sum of its proper divisors (7403725221).

20469122139 is a wasteful number, since it uses less digits than its factorization.

20469122139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 145171129.

The product of its (nonzero) digits is 46656, while the sum is 39.

The spelling of 20469122139 in words is "twenty billion, four hundred sixty-nine million, one hundred twenty-two thousand, one hundred thirty-nine".