21112163450 has 96 divisors (see below), whose sum is σ = 46939495680. Its totient is φ = 6907507200.

The previous prime is 21112163437. The next prime is 21112163489. The reversal of 21112163450 is 5436121112.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 3708206 + ... + 3713894.

It is an arithmetic number, because the mean of its divisors is an integer number (488953080).

Almost surely, 2^21112163450 is an apocalyptic number.

21112163450 is an abundant number, since it is smaller than the sum of its proper divisors (25827332230).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21112163450 is a wasteful number, since it uses less digits than its factorization.

21112163450 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6192 (or 6187 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 26.

Adding to 21112163450 its reverse (5436121112), we get a palindrome (26548284562).

The spelling of 21112163450 in words is "twenty-one billion, one hundred twelve million, one hundred sixty-three thousand, four hundred fifty".