20852878858 has 16 divisors (see below), whose sum is σ = 35762459904. Its totient is φ = 8933281200.

The previous prime is 20852878751. The next prime is 20852878859. The reversal of 20852878858 is 85887825802.

It is a junction number, because it is equal to n+sod(n) for n = 20852878796 and 20852878805.

It is not an unprimeable number, because it can be changed into a prime (20852878859) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 270093 + ... + 338608.

It is an arithmetic number, because the mean of its divisors is an integer number (2235153744).

Almost surely, 2^20852878858 is an apocalyptic number.

20852878858 is a deficient number, since it is larger than the sum of its proper divisors (14909581046).

20852878858 is a wasteful number, since it uses less digits than its factorization.

20852878858 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 611157.

The product of its (nonzero) digits is 22937600, while the sum is 61.

The spelling of 20852878858 in words is "twenty billion, eight hundred fifty-two million, eight hundred seventy-eight thousand, eight hundred fifty-eight".