20658942139 has 16 divisors (see below), whose sum is σ = 22746255840. Its totient is φ = 18761872800.

The previous prime is 20658942131. The next prime is 20658942179. The reversal of 20658942139 is 93124985602.

It is not a de Polignac number, because 20658942139 - 2³ = 20658942131 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20658942092 and 20658942101.

It is not an unprimeable number, because it can be changed into a prime (20658942131) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1404877 + ... + 1419505.

It is an arithmetic number, because the mean of its divisors is an integer number (1421640990).

Almost surely, 2^20658942139 is an apocalyptic number.

20658942139 is a deficient number, since it is larger than the sum of its proper divisors (2087313701).

20658942139 is a wasteful number, since it uses less digits than its factorization.

20658942139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15723 (or 15701 counting only the distinct ones).

The product of its (nonzero) digits is 933120, while the sum is 49.

The spelling of 20658942139 in words is "twenty billion, six hundred fifty-eight million, nine hundred forty-two thousand, one hundred thirty-nine".