21402410322403 has 4 divisors (see below), whose sum is σ = 23348083988088. Its totient is φ = 19456736656720.

The previous prime is 21402410322389. The next prime is 21402410322407. The reversal of 21402410322403 is 30422301420412.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 21402410322403 - 2¹³ = 21402410314211 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21402410322407) 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, 972836832826 + ... + 972836832847.

It is an arithmetic number, because the mean of its divisors is an integer number (5837020997022).

Almost surely, 2^{21402410322403} is an apocalyptic number.

21402410322403 is a deficient number, since it is larger than the sum of its proper divisors (1945673665685).

21402410322403 is a wasteful number, since it uses less digits than its factorization.

21402410322403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1945673665684.

The product of its (nonzero) digits is 9216, while the sum is 28.

Adding to 21402410322403 its reverse (30422301420412), we get a palindrome (51824711742815).

The spelling of 21402410322403 in words is "twenty-one trillion, four hundred two billion, four hundred ten million, three hundred twenty-two thousand, four hundred three".