21869488 has 10 divisors (see below), whose sum is σ = 42372164. Its totient is φ = 10934736.

The previous prime is 21869483. The next prime is 21869521. The reversal of 21869488 is 88496812.

It is not an unprimeable number, because it can be changed into a prime (21869483) by changing a digit.

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, 683406 + ... + 683437.

Almost surely, 2^21869488 is an apocalyptic number.

It is an amenable number.

21869488 is a deficient number, since it is larger than the sum of its proper divisors (20502676).

21869488 is a wasteful number, since it uses less digits than its factorization.

21869488 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1366851 (or 1366845 counting only the distinct ones).

The product of its digits is 221184, while the sum is 46.

The square root of 21869488 is about 4676.4824387567. The cubic root of 21869488 is about 279.6487432101.

The spelling of 21869488 in words is "twenty-one million, eight hundred sixty-nine thousand, four hundred eighty-eight".