20853133678 has 32 divisors (see below), whose sum is σ = 35461613376. Its totient is φ = 9124566528.

The previous prime is 20853133663. The next prime is 20853133687. The reversal of 20853133678 is 87633135802.

It is a Harshad number since it is a multiple of its sum of digits (46).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 86725 + ... + 221872.

It is an arithmetic number, because the mean of its divisors is an integer number (1108175418).

Almost surely, 2^20853133678 is an apocalyptic number.

20853133678 is a deficient number, since it is larger than the sum of its proper divisors (14608479698).

20853133678 is a wasteful number, since it uses less digits than its factorization.

20853133678 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 308748.

The product of its (nonzero) digits is 725760, while the sum is 46.

The spelling of 20853133678 in words is "twenty billion, eight hundred fifty-three million, one hundred thirty-three thousand, six hundred seventy-eight".