21003200053 has 16 divisors (see below), whose sum is σ = 23943983616. Its totient is φ = 18236761840.

The previous prime is 21003200021. The next prime is 21003200063. The reversal of 21003200053 is 35000230012.

It is not a de Polignac number, because 21003200053 - 2⁵ = 21003200021 is a prime.

It is a super-2 number, since 2×21003200053² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21003200063) 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 15 ways as a sum of consecutive naturals, for example, 112026 + ... + 233572.

It is an arithmetic number, because the mean of its divisors is an integer number (1496498976).

Almost surely, 2^21003200053 is an apocalyptic number.

21003200053 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

It is an amenable number.

21003200053 is a deficient number, since it is larger than the sum of its proper divisors (2940783563).

21003200053 is a wasteful number, since it uses less digits than its factorization.

21003200053 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 122264.

The product of its (nonzero) digits is 180, while the sum is 16.

Adding to 21003200053 its reverse (35000230012), we get a palindrome (56003430065).

The spelling of 21003200053 in words is "twenty-one billion, three million, two hundred thousand, fifty-three".