20542100103 has 24 divisors (see below), whose sum is σ = 34416906368. Its totient is φ = 11563141392.

The previous prime is 20542100083. The next prime is 20542100113. The reversal of 20542100103 is 30100124502.

20542100103 is a `hidden beast` number, since 20 + 542 + 1 + 0 + 0 + 103 = 666.

It is not a de Polignac number, because 20542100103 - 2¹⁸ = 20541837959 is a prime.

It is a super-2 number, since 2×20542100103² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20542100113) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2429101 + ... + 2437542.

Almost surely, 2^20542100103 is an apocalyptic number.

20542100103 is a deficient number, since it is larger than the sum of its proper divisors (13874806265).

20542100103 is a wasteful number, since it uses less digits than its factorization.

20542100103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4866723 (or 4866720 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

Adding to 20542100103 its reverse (30100124502), we get a palindrome (50642224605).

The spelling of 20542100103 in words is "twenty billion, five hundred forty-two million, one hundred thousand, one hundred three".