21141616 has 10 divisors (see below), whose sum is σ = 40961912. Its totient is φ = 10570800.

The previous prime is 21141611. The next prime is 21141629. The reversal of 21141616 is 61614112.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21141611) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 660660 + ... + 660691.

Almost surely, 2^21141616 is an apocalyptic number.

It is an amenable number.

21141616 is a deficient number, since it is larger than the sum of its proper divisors (19820296).

21141616 is a wasteful number, since it uses less digits than its factorization.

21141616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1321359 (or 1321353 counting only the distinct ones).

The product of its digits is 288, while the sum is 22.

The square root of 21141616 is about 4598.0013049150. The cubic root of 21141616 is about 276.5111998925.

Adding to 21141616 its reverse (61614112), we get a palindrome (82755728).

It can be divided in two parts, 21141 and 616, that multiplied together give a triangular number (13022856 = T₅₁₀₃).

The spelling of 21141616 in words is "twenty-one million, one hundred forty-one thousand, six hundred sixteen".