21044200053 has 8 divisors (see below), whose sum is σ = 28964060416. Its totient is φ = 13576903200.

The previous prime is 21044200033. The next prime is 21044200103. The reversal of 21044200053 is 35000244012.

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

It is not a de Polignac number, because 21044200053 - 2¹⁸ = 21043937909 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 (21044200003) 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, 113140768 + ... + 113140953.

It is an arithmetic number, because the mean of its divisors is an integer number (3620507552).

Almost surely, 2^21044200053 is an apocalyptic number.

It is an amenable number.

21044200053 is a deficient number, since it is larger than the sum of its proper divisors (7919860363).

21044200053 is a wasteful number, since it uses less digits than its factorization.

21044200053 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 226281755.

The product of its (nonzero) digits is 960, while the sum is 21.

Adding to 21044200053 its reverse (35000244012), we get a palindrome (56044444065).

The spelling of 21044200053 in words is "twenty-one billion, forty-four million, two hundred thousand, fifty-three".