20853463116856 has 128 divisors (see below), whose sum is σ = 41697889200000. Its totient is φ = 9761861007360.

The previous prime is 20853463116823. The next prime is 20853463116869. The reversal of 20853463116856 is 65861136435802.

It is a happy number.

It is a super-2 number, since 2×20853463116856² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (58).

It is a self number, because there is not a number n which added to its sum of digits gives 20853463116856.

It is a congruent number.

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 31 ways as a sum of consecutive naturals, for example, 306937066 + ... + 307004998.

It is an arithmetic number, because the mean of its divisors is an integer number (325764759375).

Almost surely, 2^{20853463116856} is an apocalyptic number.

It is an amenable number.

20853463116856 is a deficient number, since it is larger than the sum of its proper divisors (20844426083144).

20853463116856 is a wasteful number, since it uses less digits than its factorization.

20853463116856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68337 (or 68333 counting only the distinct ones).

The product of its (nonzero) digits is 24883200, while the sum is 58.

The spelling of 20853463116856 in words is "twenty trillion, eight hundred fifty-three billion, four hundred sixty-three million, one hundred sixteen thousand, eight hundred fifty-six".