21872203852 has 24 divisors (see below), whose sum is σ = 38641050000. Its totient is φ = 10832375616.

The previous prime is 21872203831. The next prime is 21872203861. The reversal of 21872203852 is 25830227812.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 127399 + ... + 244897.

It is an arithmetic number, because the mean of its divisors is an integer number (1610043750).

Almost surely, 2^21872203852 is an apocalyptic number.

It is an amenable number.

21872203852 is a deficient number, since it is larger than the sum of its proper divisors (16768846148).

21872203852 is a wasteful number, since it uses less digits than its factorization.

21872203852 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 117945 (or 117943 counting only the distinct ones).

The product of its (nonzero) digits is 107520, while the sum is 40.

The spelling of 21872203852 in words is "twenty-one billion, eight hundred seventy-two million, two hundred three thousand, eight hundred fifty-two".