13420420203 has 4 divisors (see below), whose sum is σ = 17893893608. Its totient is φ = 8946946800.

The previous prime is 13420420199. The next prime is 13420420249. The reversal of 13420420203 is 30202402431.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 30202402431 = 3 ⋅10067467477.

It is not a de Polignac number, because 13420420203 - 2² = 13420420199 is a prime.

It is a super-2 number, since 2×13420420203² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 13420420203.

It is not an unprimeable number, because it can be changed into a prime (13420420003) 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, 2236736698 + ... + 2236736703.

It is an arithmetic number, because the mean of its divisors is an integer number (4473473402).

Almost surely, 2^13420420203 is an apocalyptic number.

13420420203 is a deficient number, since it is larger than the sum of its proper divisors (4473473405).

13420420203 is an equidigital number, since it uses as much as digits as its factorization.

13420420203 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4473473404.

The product of its (nonzero) digits is 1152, while the sum is 21.

Adding to 13420420203 its reverse (30202402431), we get a palindrome (43622822634).

The spelling of 13420420203 in words is "thirteen billion, four hundred twenty million, four hundred twenty thousand, two hundred three".