21350652836 has 12 divisors (see below), whose sum is σ = 37372981212. Its totient is φ = 10672658208.

The previous prime is 21350652821. The next prime is 21350652857. The reversal of 21350652836 is 63825605312.

It can be written as a sum of positive squares in 2 ways, for example, as 6447126436 + 14903526400 = 80294^2 + 122080^2 .

It is a junction number, because it is equal to n+sod(n) for n = 21350652793 and 21350652802.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 648995 + ... + 681098.

It is an arithmetic number, because the mean of its divisors is an integer number (3114415101).

Almost surely, 2^21350652836 is an apocalyptic number.

It is an amenable number.

21350652836 is a deficient number, since it is larger than the sum of its proper divisors (16022328376).

21350652836 is a wasteful number, since it uses less digits than its factorization.

21350652836 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1334110 (or 1334108 counting only the distinct ones).

The product of its (nonzero) digits is 259200, while the sum is 41.

The spelling of 21350652836 in words is "twenty-one billion, three hundred fifty million, six hundred fifty-two thousand, eight hundred thirty-six".