21034052053 has 4 divisors (see below), whose sum is σ = 24038916640. Its totient is φ = 18029187468.

The previous prime is 21034052047. The next prime is 21034052059. The reversal of 21034052053 is 35025043012.

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 an interprime number because it is at equal distance from previous prime (21034052047) and next prime (21034052059).

It is a cyclic number.

It is not a de Polignac number, because 21034052053 - 2⁵ = 21034052021 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 (21034052059) 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 3 ways as a sum of consecutive naturals, for example, 1502432283 + ... + 1502432296.

It is an arithmetic number, because the mean of its divisors is an integer number (6009729160).

Almost surely, 2^21034052053 is an apocalyptic number.

It is an amenable number.

21034052053 is a deficient number, since it is larger than the sum of its proper divisors (3004864587).

21034052053 is an equidigital number, since it uses as much as digits as its factorization.

21034052053 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3004864586.

The product of its (nonzero) digits is 3600, while the sum is 25.

Adding to 21034052053 its reverse (35025043012), we get a palindrome (56059095065).

The spelling of 21034052053 in words is "twenty-one billion, thirty-four million, fifty-two thousand, fifty-three".