21880112 has 10 divisors (see below), whose sum is σ = 42392748. Its totient is φ = 10940048.

The previous prime is 21880099. The next prime is 21880121. The reversal of 21880112 is 21108812.

It is a happy number.

It is a super-2 number, since 2×21880112² = 957478602265088, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 683738 + ... + 683769.

Almost surely, 2^21880112 is an apocalyptic number.

It is an amenable number.

21880112 is a deficient number, since it is larger than the sum of its proper divisors (20512636).

21880112 is a wasteful number, since it uses less digits than its factorization.

21880112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1367515 (or 1367509 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 23.

The square root of 21880112 is about 4677.6181973308. The cubic root of 21880112 is about 279.6940194916.

Adding to 21880112 its reverse (21108812), we get a palindrome (42988924).

The spelling of 21880112 in words is "twenty-one million, eight hundred eighty thousand, one hundred twelve".