21270244753 has 4 divisors (see below), whose sum is σ = 21722803200. Its totient is φ = 20817686308.

The previous prime is 21270244733. The next prime is 21270244777. The reversal of 21270244753 is 35744207212.

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 21270244753 - 2¹⁷ = 21270113681 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21270244733) 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, 226279153 + ... + 226279246.

It is an arithmetic number, because the mean of its divisors is an integer number (5430700800).

Almost surely, 2^21270244753 is an apocalyptic number.

It is an amenable number.

21270244753 is a deficient number, since it is larger than the sum of its proper divisors (452558447).

21270244753 is an equidigital number, since it uses as much as digits as its factorization.

21270244753 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 452558446.

The product of its (nonzero) digits is 94080, while the sum is 37.

The spelling of 21270244753 in words is "twenty-one billion, two hundred seventy million, two hundred forty-four thousand, seven hundred fifty-three".