21800851035 has 32 divisors (see below), whose sum is σ = 35393371200. Its totient is φ = 11456759808.

The previous prime is 21800851027. The next prime is 21800851073. The reversal of 21800851035 is 53015800812.

It is a happy number.

It is not a de Polignac number, because 21800851035 - 2³ = 21800851027 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21800850987 and 21800851005.

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 31 ways as a sum of consecutive naturals, for example, 1192141 + ... + 1210289.

It is an arithmetic number, because the mean of its divisors is an integer number (1106042850).

Almost surely, 2^21800851035 is an apocalyptic number.

21800851035 is a deficient number, since it is larger than the sum of its proper divisors (13592520165).

21800851035 is a wasteful number, since it uses less digits than its factorization.

21800851035 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19327.

The product of its (nonzero) digits is 9600, while the sum is 33.

The spelling of 21800851035 in words is "twenty-one billion, eight hundred million, eight hundred fifty-one thousand, thirty-five".