21388827112 has 32 divisors (see below), whose sum is σ = 41065390080. Its totient is φ = 10438404480.

The previous prime is 21388827107. The next prime is 21388827149. The reversal of 21388827112 is 21172888312.

It is a Harshad number since it is a multiple of its sum of digits (43).

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, 488473 + ... + 530455.

It is an arithmetic number, because the mean of its divisors is an integer number (1283293440).

Almost surely, 2^21388827112 is an apocalyptic number.

It is an amenable number.

21388827112 is a deficient number, since it is larger than the sum of its proper divisors (19676562968).

21388827112 is a wasteful number, since it uses less digits than its factorization.

21388827112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43513 (or 43509 counting only the distinct ones).

The product of its digits is 86016, while the sum is 43.

The spelling of 21388827112 in words is "twenty-one billion, three hundred eighty-eight million, eight hundred twenty-seven thousand, one hundred twelve".