20340115403 has 4 divisors (see below), whose sum is σ = 20500273920. Its totient is φ = 20179956888.

The previous prime is 20340115399. The next prime is 20340115423. The reversal of 20340115403 is 30451104302.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 30451104302 = 2 ⋅15225552151.

It is a cyclic number.

It is not a de Polignac number, because 20340115403 - 2² = 20340115399 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20340115423) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 80079068 + ... + 80079321.

It is an arithmetic number, because the mean of its divisors is an integer number (5125068480).

Almost surely, 2^20340115403 is an apocalyptic number.

20340115403 is a deficient number, since it is larger than the sum of its proper divisors (160158517).

20340115403 is a wasteful number, since it uses less digits than its factorization.

20340115403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 160158516.

The product of its (nonzero) digits is 1440, while the sum is 23.

Adding to 20340115403 its reverse (30451104302), we get a palindrome (50791219705).

The spelling of 20340115403 in words is "twenty billion, three hundred forty million, one hundred fifteen thousand, four hundred three".