21838112 has 24 divisors (see below), whose sum is σ = 43122492. Its totient is φ = 10886400.

The previous prime is 21838099. The next prime is 21838121. The reversal of 21838112 is 21183812.

It can be written as a sum of positive squares in 2 ways, for example, as 20830096 + 1008016 = 4564^2 + 1004^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12662 + ... + 14282.

Almost surely, 2^21838112 is an apocalyptic number.

It is an amenable number.

21838112 is a deficient number, since it is larger than the sum of its proper divisors (21284380).

21838112 is a wasteful number, since it uses less digits than its factorization.

21838112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2052 (or 2044 counting only the distinct ones).

The product of its digits is 768, while the sum is 26.

The square root of 21838112 is about 4673.1265765010. The cubic root of 21838112 is about 279.5149425097.

The spelling of 21838112 in words is "twenty-one million, eight hundred thirty-eight thousand, one hundred twelve".