21226020053 has 8 divisors (see below), whose sum is σ = 24508395072. Its totient is φ = 18006166656.

The previous prime is 21226020047. The next prime is 21226020073. The reversal of 21226020053 is 35002062212.

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 21226020053 - 2⁶ = 21226019989 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21226020073) 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 7 ways as a sum of consecutive naturals, for example, 15629675 + ... + 15631032.

It is an arithmetic number, because the mean of its divisors is an integer number (3063549384).

Almost surely, 2^21226020053 is an apocalyptic number.

It is an amenable number.

21226020053 is a deficient number, since it is larger than the sum of its proper divisors (3282375019).

21226020053 is an equidigital number, since it uses as much as digits as its factorization.

21226020053 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31260811.

The product of its (nonzero) digits is 1440, while the sum is 23.

Adding to 21226020053 its reverse (35002062212), we get a palindrome (56228082265).

The spelling of 21226020053 in words is "twenty-one billion, two hundred twenty-six million, twenty thousand, fifty-three".