21342343203 has 6 divisors (see below), whose sum is σ = 30827829084. Its totient is φ = 14228228796.

The previous prime is 21342343189. The next prime is 21342343271. The reversal of 21342343203 is 30234324312.

21342343203 is a `hidden beast` number, since 213 + 423 + 4 + 3 + 20 + 3 = 666.

It is not a de Polignac number, because 21342343203 - 2⁸ = 21342342947 is a prime.

It is a super-2 number, since 2×21342343203² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21342343283) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1185685725 + ... + 1185685742.

It is an arithmetic number, because the mean of its divisors is an integer number (5137971514).

Almost surely, 2^21342343203 is an apocalyptic number.

21342343203 is a deficient number, since it is larger than the sum of its proper divisors (9485485881).

21342343203 is a wasteful number, since it uses less digits than its factorization.

21342343203 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2371371473 (or 2371371470 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 27.

Adding to 21342343203 its reverse (30234324312), we get a palindrome (51576667515).

The spelling of 21342343203 in words is "twenty-one billion, three hundred forty-two million, three hundred forty-three thousand, two hundred three".