21274617241826 has 16 divisors (see below), whose sum is σ = 34368269873784. Its totient is φ = 9818602545024.

The previous prime is 21274617241783. The next prime is 21274617241837. The reversal of 21274617241826 is 62814271647212.

It can be written as a sum of positive squares in 4 ways, for example, as 14719998322225 + 6554618919601 = 3836665^2 + 2560199^2 .

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 7 ways as a sum of consecutive naturals, for example, 18238715 + ... + 19370078.

Almost surely, 2^{21274617241826} is an apocalyptic number.

21274617241826 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

21274617241826 is a deficient number, since it is larger than the sum of its proper divisors (13093652631958).

21274617241826 is a wasteful number, since it uses less digits than its factorization.

21274617241826 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37630565.

The product of its digits is 3612672, while the sum is 53.

The spelling of 21274617241826 in words is "twenty-one trillion, two hundred seventy-four billion, six hundred seventeen million, two hundred forty-one thousand, eight hundred twenty-six".