21201799852 has 12 divisors (see below), whose sum is σ = 37105179160. Its totient is φ = 10600320096.

The previous prime is 21201799813. The next prime is 21201799873. The reversal of 21201799852 is 25899710212.

It is a hoax number, since the sum of its digits (46) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 56718 + ... + 213589.

Almost surely, 2^21201799852 is an apocalyptic number.

It is an amenable number.

21201799852 is a deficient number, since it is larger than the sum of its proper divisors (15903379308).

21201799852 is a wasteful number, since it uses less digits than its factorization.

21201799852 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 289920 (or 289918 counting only the distinct ones).

The product of its (nonzero) digits is 181440, while the sum is 46.

The spelling of 21201799852 in words is "twenty-one billion, two hundred one million, seven hundred ninety-nine thousand, eight hundred fifty-two".