19221811852 has 24 divisors (see below), whose sum is σ = 35667077040. Its totient is φ = 9038603520.

The previous prime is 19221811841. The next prime is 19221811877. The reversal of 19221811852 is 25811812291.

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 7 ways as a sum of consecutive naturals, for example, 912649 + ... + 933472.

It is an arithmetic number, because the mean of its divisors is an integer number (1486128210).

Almost surely, 2^19221811852 is an apocalyptic number.

It is an amenable number.

19221811852 is a deficient number, since it is larger than the sum of its proper divisors (16445265188).

19221811852 is a wasteful number, since it uses less digits than its factorization.

19221811852 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1846281 (or 1846279 counting only the distinct ones).

The product of its digits is 23040, while the sum is 40.

The spelling of 19221811852 in words is "nineteen billion, two hundred twenty-one million, eight hundred eleven thousand, eight hundred fifty-two".