21022364053 has 4 divisors (see below), whose sum is σ = 21033662188. Its totient is φ = 21011065920.

The previous prime is 21022364039. The next prime is 21022364071. The reversal of 21022364053 is 35046322012.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1000963044 + 20021401009 = 31638^2 + 141497^2 .

It is a cyclic number.

It is not a de Polignac number, because 21022364053 - 2²¹ = 21020266901 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 (21022364023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5646276 + ... + 5649997.

It is an arithmetic number, because the mean of its divisors is an integer number (5258415547).

Almost surely, 2^21022364053 is an apocalyptic number.

It is an amenable number.

21022364053 is a deficient number, since it is larger than the sum of its proper divisors (11298135).

21022364053 is a wasteful number, since it uses less digits than its factorization.

21022364053 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11298134.

The product of its (nonzero) digits is 8640, while the sum is 28.

Adding to 21022364053 its reverse (35046322012), we get a palindrome (56068686065).

The spelling of 21022364053 in words is "twenty-one billion, twenty-two million, three hundred sixty-four thousand, fifty-three".