13203403421 has 8 divisors (see below), whose sum is σ = 14224059864. Its totient is φ = 12183462720.

The previous prime is 13203403363. The next prime is 13203403453. The reversal of 13203403421 is 12430430231.

It can be written as a sum of positive squares in 4 ways, for example, as 12880921 + 13190522500 = 3589^2 + 114850^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 13203403421 - 2²⁶ = 13136294557 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 (13203403321) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 140306 + ... + 214691.

It is an arithmetic number, because the mean of its divisors is an integer number (1778007483).

Almost surely, 2^13203403421 is an apocalyptic number.

It is an amenable number.

13203403421 is a deficient number, since it is larger than the sum of its proper divisors (1020656443).

13203403421 is a wasteful number, since it uses less digits than its factorization.

13203403421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 357871.

The product of its (nonzero) digits is 1728, while the sum is 23.

Adding to 13203403421 its reverse (12430430231), we get a palindrome (25633833652).

The spelling of 13203403421 in words is "thirteen billion, two hundred three million, four hundred three thousand, four hundred twenty-one".