21818062325 has 6 divisors (see below), whose sum is σ = 27054397314. Its totient is φ = 17454449840.

The previous prime is 21818062313. The next prime is 21818062367. The reversal of 21818062325 is 52326081812.

It can be written as a sum of positive squares in 3 ways, for example, as 6398880049 + 15419182276 = 79993^2 + 124174^2 .

It is not a de Polignac number, because 21818062325 - 2¹⁴ = 21818045941 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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 5 ways as a sum of consecutive naturals, for example, 436361222 + ... + 436361271.

It is an arithmetic number, because the mean of its divisors is an integer number (4509066219).

Almost surely, 2^21818062325 is an apocalyptic number.

21818062325 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

21818062325 is a deficient number, since it is larger than the sum of its proper divisors (5236334989).

21818062325 is an equidigital number, since it uses as much as digits as its factorization.

21818062325 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 872722503 (or 872722498 counting only the distinct ones).

The product of its (nonzero) digits is 46080, while the sum is 38.

The spelling of 21818062325 in words is "twenty-one billion, eight hundred eighteen million, sixty-two thousand, three hundred twenty-five".