21572898253 has 2 divisors, whose sum is σ = 21572898254. Its totient is φ = 21572898252.

The previous prime is 21572898251. The next prime is 21572898283. The reversal of 21572898253 is 35289827512.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20301405289 + 1271492964 = 142483^2 + 35658^2 .

It is a cyclic number.

It is not a de Polignac number, because 21572898253 - 2¹ = 21572898251 is a prime.

Together with 21572898251, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 21572898253.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21572898251) 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 as a sum of consecutive naturals, namely, 10786449126 + 10786449127.

It is an arithmetic number, because the mean of its divisors is an integer number (10786449127).

Almost surely, 2^21572898253 is an apocalyptic number.

It is an amenable number.

21572898253 is a deficient number, since it is larger than the sum of its proper divisors (1).

21572898253 is an equidigital number, since it uses as much as digits as its factorization.

21572898253 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2419200, while the sum is 52.

The spelling of 21572898253 in words is "twenty-one billion, five hundred seventy-two million, eight hundred ninety-eight thousand, two hundred fifty-three".