21134426203 has 8 divisors (see below), whose sum is σ = 23333518656. Its totient is φ = 18981630600.

The previous prime is 21134426191. The next prime is 21134426213. The reversal of 21134426203 is 30262443112.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 21134426203 - 2²¹ = 21132329051 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21134426213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11573253 + ... + 11575078.

It is an arithmetic number, because the mean of its divisors is an integer number (2916689832).

Almost surely, 2^21134426203 is an apocalyptic number.

21134426203 is a deficient number, since it is larger than the sum of its proper divisors (2199092453).

21134426203 is a wasteful number, since it uses less digits than its factorization.

21134426203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23148425.

The product of its (nonzero) digits is 6912, while the sum is 28.

Adding to 21134426203 its reverse (30262443112), we get a palindrome (51396869315).

The spelling of 21134426203 in words is "twenty-one billion, one hundred thirty-four million, four hundred twenty-six thousand, two hundred three".