20139392103 has 16 divisors (see below), whose sum is σ = 27248954880. Its totient is φ = 13229266176.

The previous prime is 20139392101. The next prime is 20139392177. The reversal of 20139392103 is 30129393102.

It is not a de Polignac number, because 20139392103 - 2¹ = 20139392101 is a prime.

It is a super-2 number, since 2×20139392103² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20139392101) 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, 86383 + ... + 218496.

It is an arithmetic number, because the mean of its divisors is an integer number (1703059680).

Almost surely, 2^20139392103 is an apocalyptic number.

20139392103 is a deficient number, since it is larger than the sum of its proper divisors (7109562777).

20139392103 is a wasteful number, since it uses less digits than its factorization.

20139392103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 305206.

The product of its (nonzero) digits is 8748, while the sum is 33.

Subtracting 20139392103 from its reverse (30129393102), we obtain a palindrome (9990000999).

The spelling of 20139392103 in words is "twenty billion, one hundred thirty-nine million, three hundred ninety-two thousand, one hundred three".