20431101403 has 4 divisors (see below), whose sum is σ = 20433279960. Its totient is φ = 20428922848.

The previous prime is 20431101401. The next prime is 20431101407. The reversal of 20431101403 is 30410113402.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 30410113402 = 2 ⋅15205056701.

It is a cyclic number.

It is not a de Polignac number, because 20431101403 - 2¹ = 20431101401 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20431101401) 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, 1075150 + ... + 1093987.

It is an arithmetic number, because the mean of its divisors is an integer number (5108319990).

Almost surely, 2^20431101403 is an apocalyptic number.

20431101403 is a deficient number, since it is larger than the sum of its proper divisors (2178557).

20431101403 is an equidigital number, since it uses as much as digits as its factorization.

20431101403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2178556.

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 20431101403 its reverse (30410113402), we get a palindrome (50841214805).

The spelling of 20431101403 in words is "twenty billion, four hundred thirty-one million, one hundred one thousand, four hundred three".