21300130553 has 8 divisors (see below), whose sum is σ = 22945100808. Its totient is φ = 19656088704.

The previous prime is 21300130543. The next prime is 21300130561. The reversal of 21300130553 is 35503100312.

It can be written as a sum of positive squares in 4 ways, for example, as 1925717689 + 19374412864 = 43883^2 + 139192^2 .

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 21300130553 - 2³⁰ = 20226388729 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21300130543) 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, 184076 + ... + 276557.

It is an arithmetic number, because the mean of its divisors is an integer number (2868137601).

Almost surely, 2^21300130553 is an apocalyptic number.

It is an amenable number.

21300130553 is a deficient number, since it is larger than the sum of its proper divisors (1644970255).

21300130553 is a wasteful number, since it uses less digits than its factorization.

21300130553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 464203.

The product of its (nonzero) digits is 1350, while the sum is 23.

Adding to 21300130553 its reverse (35503100312), we get a palindrome (56803230865).

The spelling of 21300130553 in words is "twenty-one billion, three hundred million, one hundred thirty thousand, five hundred fifty-three".