21160024 has 32 divisors (see below), whose sum is σ = 41328000. Its totient is φ = 10144512.

The previous prime is 21160021. The next prime is 21160043. The reversal of 21160024 is 42006112.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21160021) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 51532 + ... + 51940.

It is an arithmetic number, because the mean of its divisors is an integer number (1291500).

Almost surely, 2^21160024 is an apocalyptic number.

It is an amenable number.

21160024 is a deficient number, since it is larger than the sum of its proper divisors (20167976).

21160024 is a wasteful number, since it uses less digits than its factorization.

21160024 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 667 (or 663 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 16.

The square root of 21160024 is about 4600.0026086949. The cubic root of 21160024 is about 276.5914293570.

Adding to 21160024 its reverse (42006112), we get a palindrome (63166136).

The spelling of 21160024 in words is "twenty-one million, one hundred sixty thousand, twenty-four".