20405114521103 has 16 divisors (see below), whose sum is σ = 22013944493856. Its totient is φ = 18801898536960.

The previous prime is 20405114521079. The next prime is 20405114521133. The reversal of 20405114521103 is 30112541150402.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 20405114521103 - 2³⁰ = 20404040779279 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20405114521133) 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, 37285175 + ... + 37828487.

It is an arithmetic number, because the mean of its divisors is an integer number (1375871530866).

Almost surely, 2^{20405114521103} is an apocalyptic number.

20405114521103 is a deficient number, since it is larger than the sum of its proper divisors (1608829972753).

20405114521103 is a wasteful number, since it uses less digits than its factorization.

20405114521103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 548474.

The product of its (nonzero) digits is 4800, while the sum is 29.

Adding to 20405114521103 its reverse (30112541150402), we get a palindrome (50517655671505).

The spelling of 20405114521103 in words is "twenty trillion, four hundred five billion, one hundred fourteen million, five hundred twenty-one thousand, one hundred three".