21448495273 has 2 divisors, whose sum is σ = 21448495274. Its totient is φ = 21448495272.

The previous prime is 21448495267. The next prime is 21448495283. The reversal of 21448495273 is 37259484412.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13283023504 + 8165471769 = 115252^2 + 90363^2 .

It is a cyclic number.

It is not a de Polignac number, because 21448495273 - 2⁵ = 21448495241 is a prime.

It is not a weakly prime, because it can be changed into another prime (21448495253) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10724247636 + 10724247637.

It is an arithmetic number, because the mean of its divisors is an integer number (10724247637).

Almost surely, 2^21448495273 is an apocalyptic number.

It is an amenable number.

21448495273 is a deficient number, since it is larger than the sum of its proper divisors (1).

21448495273 is an equidigital number, since it uses as much as digits as its factorization.

21448495273 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1935360, while the sum is 49.

The spelling of 21448495273 in words is "twenty-one billion, four hundred forty-eight million, four hundred ninety-five thousand, two hundred seventy-three".