20154323403 has 12 divisors (see below), whose sum is σ = 29115325408. Its totient is φ = 13434588720.

The previous prime is 20154323389. The next prime is 20154323419. The reversal of 20154323403 is 30432345102.

20154323403 is a `hidden beast` number, since 201 + 54 + 3 + 2 + 3 + 403 = 666.

It is not a de Polignac number, because 20154323403 - 2¹⁰ = 20154322379 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20154323443) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 54568 + ... + 208053.

Almost surely, 2^20154323403 is an apocalyptic number.

20154323403 is a deficient number, since it is larger than the sum of its proper divisors (8961002005).

20154323403 is a wasteful number, since it uses less digits than its factorization.

20154323403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 271154 (or 271151 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 27.

Adding to 20154323403 its reverse (30432345102), we get a palindrome (50586668505).

The spelling of 20154323403 in words is "twenty billion, one hundred fifty-four million, three hundred twenty-three thousand, four hundred three".