21036134603 has 8 divisors (see below), whose sum is σ = 22955740416. Its totient is φ = 19117733800.

The previous prime is 21036134569. The next prime is 21036134633. The reversal of 21036134603 is 30643163012.

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

It is not a de Polignac number, because 21036134603 - 2²⁰ = 21035086027 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21036134633) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 264551 + ... + 334752.

It is an arithmetic number, because the mean of its divisors is an integer number (2869467552).

Almost surely, 2^21036134603 is an apocalyptic number.

21036134603 is a deficient number, since it is larger than the sum of its proper divisors (1919605813).

21036134603 is a wasteful number, since it uses less digits than its factorization.

21036134603 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 602505.

The product of its (nonzero) digits is 7776, while the sum is 29.

Adding to 21036134603 its reverse (30643163012), we get a palindrome (51679297615).

The spelling of 21036134603 in words is "twenty-one billion, thirty-six million, one hundred thirty-four thousand, six hundred three".