21810037828514 has 8 divisors (see below), whose sum is σ = 35231599569180. Its totient is φ = 10066171305456.

The previous prime is 21810037828493. The next prime is 21810037828591. The reversal of 21810037828514 is 41582873001812.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 18373370697889 + 3436667130625 = 4286417^2 + 1853825^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 419423804369 + ... + 419423804420.

Almost surely, 2^{21810037828514} is an apocalyptic number.

21810037828514 is a deficient number, since it is larger than the sum of its proper divisors (13421561740666).

21810037828514 is a wasteful number, since it uses less digits than its factorization.

21810037828514 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 838847608804.

The product of its (nonzero) digits is 860160, while the sum is 50.

The spelling of 21810037828514 in words is "twenty-one trillion, eight hundred ten billion, thirty-seven million, eight hundred twenty-eight thousand, five hundred fourteen".