21022050053 has 4 divisors (see below), whose sum is σ = 22128473760. Its totient is φ = 19915626348.

The previous prime is 21022050037. The next prime is 21022050073. The reversal of 21022050053 is 35005022012.

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 21022050053 - 2⁴ = 21022050037 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 (21022050073) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 553211825 + ... + 553211862.

It is an arithmetic number, because the mean of its divisors is an integer number (5532118440).

Almost surely, 2^21022050053 is an apocalyptic number.

It is an amenable number.

21022050053 is a deficient number, since it is larger than the sum of its proper divisors (1106423707).

21022050053 is a wasteful number, since it uses less digits than its factorization.

21022050053 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1106423706.

The product of its (nonzero) digits is 600, while the sum is 20.

Adding to 21022050053 its reverse (35005022012), we get a palindrome (56027072065).

The spelling of 21022050053 in words is "twenty-one billion, twenty-two million, fifty thousand, fifty-three".