21435403053 has 8 divisors (see below), whose sum is σ = 28623909600. Its totient is φ = 14268582608.

The previous prime is 21435403049. The next prime is 21435403079. The reversal of 21435403053 is 35030453412.

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 21435403053 - 2² = 21435403049 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 21435403053.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21435403453) 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, 5419218 + ... + 5423171.

It is an arithmetic number, because the mean of its divisors is an integer number (3577988700).

Almost surely, 2^21435403053 is an apocalyptic number.

It is an amenable number.

21435403053 is a deficient number, since it is larger than the sum of its proper divisors (7188506547).

21435403053 is a wasteful number, since it uses less digits than its factorization.

21435403053 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10843051.

The product of its (nonzero) digits is 21600, while the sum is 30.

Adding to 21435403053 its reverse (35030453412), we get a palindrome (56465856465).

The spelling of 21435403053 in words is "twenty-one billion, four hundred thirty-five million, four hundred three thousand, fifty-three".