21453020530001 has 4 divisors (see below), whose sum is σ = 21453360432192. Its totient is φ = 21452680627812.

The previous prime is 21453020529949. The next prime is 21453020530061. The reversal of 21453020530001 is 10003502035412.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 21453020530001 - 2⁶ = 21453020529937 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21453020530061) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 169856405 + ... + 169982658.

It is an arithmetic number, because the mean of its divisors is an integer number (5363340108048).

Almost surely, 2^{21453020530001} is an apocalyptic number.

It is an amenable number.

21453020530001 is a deficient number, since it is larger than the sum of its proper divisors (339902191).

21453020530001 is an equidigital number, since it uses as much as digits as its factorization.

21453020530001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 339902190.

The product of its (nonzero) digits is 3600, while the sum is 26.

Adding to 21453020530001 its reverse (10003502035412), we get a palindrome (31456522565413).

The spelling of 21453020530001 in words is "twenty-one trillion, four hundred fifty-three billion, twenty million, five hundred thirty thousand, one".