21527416 has 16 divisors (see below), whose sum is σ = 40589640. Its totient is φ = 10703520.

The previous prime is 21527411. The next prime is 21527417. The reversal of 21527416 is 61472512.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21527411) 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 in 3 ways as a sum of consecutive naturals, for example, 5986 + ... + 8881.

Almost surely, 2^21527416 is an apocalyptic number.

It is an amenable number.

21527416 is a deficient number, since it is larger than the sum of its proper divisors (19062224).

21527416 is a wasteful number, since it uses less digits than its factorization.

21527416 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15054 (or 15050 counting only the distinct ones).

The product of its digits is 3360, while the sum is 28.

The square root of 21527416 is about 4639.7646492037. The cubic root of 21527416 is about 278.1830307897.

Adding to 21527416 its reverse (61472512), we get a palindrome (82999928).

The spelling of 21527416 in words is "twenty-one million, five hundred twenty-seven thousand, four hundred sixteen".