20706032139 has 16 divisors (see below), whose sum is σ = 29734670112. Its totient is φ = 12740917248.

The previous prime is 20706032117. The next prime is 20706032143. The reversal of 20706032139 is 93123060702.

It is a happy number.

It is not a de Polignac number, because 20706032139 - 2⁸ = 20706031883 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20706032159) 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, 517227 + ... + 555819.

It is an arithmetic number, because the mean of its divisors is an integer number (1858416882).

Almost surely, 2^20706032139 is an apocalyptic number.

20706032139 is a deficient number, since it is larger than the sum of its proper divisors (9028637973).

20706032139 is a wasteful number, since it uses less digits than its factorization.

20706032139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52366.

The product of its (nonzero) digits is 13608, while the sum is 33.

The spelling of 20706032139 in words is "twenty billion, seven hundred six million, thirty-two thousand, one hundred thirty-nine".