21227063253 has 8 divisors (see below), whose sum is σ = 30875728416. Its totient is φ = 12864886800.

The previous prime is 21227063251. The next prime is 21227063269. The reversal of 21227063253 is 35236072212.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 21227063253 - 2¹ = 21227063251 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33), and also a Moran number because the ratio is a prime number: 643244341 = 21227063253 / (2 + 1 + 2 + 2 + 7 + 0 + 6 + 3 + 2 + 5 + 3).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21227063251) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 321622138 + ... + 321622203.

It is an arithmetic number, because the mean of its divisors is an integer number (3859466052).

Almost surely, 2^21227063253 is an apocalyptic number.

It is an amenable number.

21227063253 is a deficient number, since it is larger than the sum of its proper divisors (9648665163).

21227063253 is a wasteful number, since it uses less digits than its factorization.

21227063253 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 643244355.

The product of its (nonzero) digits is 30240, while the sum is 33.

The spelling of 21227063253 in words is "twenty-one billion, two hundred twenty-seven million, sixty-three thousand, two hundred fifty-three".