20622615139 has 4 divisors (see below), whose sum is σ = 23568703024. Its totient is φ = 17676527256.

The previous prime is 20622615127. The next prime is 20622615151. The reversal of 20622615139 is 93151622602.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 93151622602 = 2 ⋅46575811301.

It is an interprime number because it is at equal distance from previous prime (20622615127) and next prime (20622615151).

It is a cyclic number.

It is not a de Polignac number, because 20622615139 - 2⁷ = 20622615011 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20622615098 and 20622615107.

It is not an unprimeable number, because it can be changed into a prime (20622615439) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1473043932 + ... + 1473043945.

It is an arithmetic number, because the mean of its divisors is an integer number (5892175756).

Almost surely, 2^20622615139 is an apocalyptic number.

20622615139 is a deficient number, since it is larger than the sum of its proper divisors (2946087885).

20622615139 is an equidigital number, since it uses as much as digits as its factorization.

20622615139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2946087884.

The product of its (nonzero) digits is 38880, while the sum is 37.

The spelling of 20622615139 in words is "twenty billion, six hundred twenty-two million, six hundred fifteen thousand, one hundred thirty-nine".