20853174263408 has 20 divisors (see below), whose sum is σ = 40608116639640. Its totient is φ = 10373660291904.

The previous prime is 20853174263401. The next prime is 20853174263423. The reversal of 20853174263408 is 80436247135802.

It is a self number, because there is not a number n which added to its sum of digits gives 20853174263408.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20853174263401) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3307924238 + ... + 3307930541.

It is an arithmetic number, because the mean of its divisors is an integer number (2030405831982).

Almost surely, 2^{20853174263408} is an apocalyptic number.

It is an amenable number.

20853174263408 is a deficient number, since it is larger than the sum of its proper divisors (19754942376232).

20853174263408 is a wasteful number, since it uses less digits than its factorization.

20853174263408 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6615854984 (or 6615854978 counting only the distinct ones).

The product of its (nonzero) digits is 7741440, while the sum is 53.

The spelling of 20853174263408 in words is "twenty trillion, eight hundred fifty-three billion, one hundred seventy-four million, two hundred sixty-three thousand, four hundred eight".