21274617241825 has 6 divisors (see below), whose sum is σ = 26380525379894. Its totient is φ = 17019693793440.

The previous prime is 21274617241783. The next prime is 21274617241837. The reversal of 21274617241825 is 52814271647212.

It can be written as a sum of positive squares in 3 ways, for example, as 4839190433856 + 16435426807969 = 2199816^2 + 4054063^2 .

It is not a de Polignac number, because 21274617241825 - 2¹⁷ = 21274617110753 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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 in 5 ways as a sum of consecutive naturals, for example, 425492344812 + ... + 425492344861.

Almost surely, 2^{21274617241825} is an apocalyptic number.

21274617241825 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

21274617241825 is a deficient number, since it is larger than the sum of its proper divisors (5105908138069).

21274617241825 is an equidigital number, since it uses as much as digits as its factorization.

21274617241825 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 850984689683 (or 850984689678 counting only the distinct ones).

The product of its digits is 3010560, while the sum is 52.

The spelling of 21274617241825 in words is "twenty-one trillion, two hundred seventy-four billion, six hundred seventeen million, two hundred forty-one thousand, eight hundred twenty-five".