21434547703 has 4 divisors (see below), whose sum is σ = 21437529040. Its totient is φ = 21431566368.

The previous prime is 21434547689. The next prime is 21434547709. The reversal of 21434547703 is 30774543412.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21434547703 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 (21434547709) 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, 1479858 + ... + 1494271.

It is an arithmetic number, because the mean of its divisors is an integer number (5359382260).

Almost surely, 2^21434547703 is an apocalyptic number.

21434547703 is a deficient number, since it is larger than the sum of its proper divisors (2981337).

21434547703 is an equidigital number, since it uses as much as digits as its factorization.

21434547703 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2981336.

The product of its (nonzero) digits is 282240, while the sum is 40.

The spelling of 21434547703 in words is "twenty-one billion, four hundred thirty-four million, five hundred forty-seven thousand, seven hundred three".