20215345781366 has 8 divisors (see below), whose sum is σ = 30323654025240. Its totient is φ = 10107461106288.

The previous prime is 20215345781357. The next prime is 20215345781383. The reversal of 20215345781366 is 66318754351202.

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

It is a Curzon number.

It is a congruent 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 3 ways as a sum of consecutive naturals, for example, 105772856 + ... + 105963803.

It is an arithmetic number, because the mean of its divisors is an integer number (3790456753155).

Almost surely, 2^{20215345781366} is an apocalyptic number.

20215345781366 is a deficient number, since it is larger than the sum of its proper divisors (10108308243874).

20215345781366 is a wasteful number, since it uses less digits than its factorization.

20215345781366 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 211784398.

The product of its (nonzero) digits is 7257600, while the sum is 53.

The spelling of 20215345781366 in words is "twenty trillion, two hundred fifteen billion, three hundred forty-five million, seven hundred eighty-one thousand, three hundred sixty-six".