21343415403 has 16 divisors (see below), whose sum is σ = 29223161856. Its totient is φ = 13850534880.

The previous prime is 21343415399. The next prime is 21343415411. The reversal of 21343415403 is 30451434312.

It is not a de Polignac number, because 21343415403 - 2² = 21343415399 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21343415453) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 508293 + ... + 548678.

It is an arithmetic number, because the mean of its divisors is an integer number (1826447616).

Almost surely, 2^21343415403 is an apocalyptic number.

21343415403 is a deficient number, since it is larger than the sum of its proper divisors (7879746453).

21343415403 is a wasteful number, since it uses less digits than its factorization.

21343415403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1057154.

The product of its (nonzero) digits is 17280, while the sum is 30.

Adding to 21343415403 its reverse (30451434312), we get a palindrome (51794849715).

The spelling of 21343415403 in words is "twenty-one billion, three hundred forty-three million, four hundred fifteen thousand, four hundred three".