21140116 has 12 divisors (see below), whose sum is σ = 37067380. Its totient is φ = 10549440.

The previous prime is 21140107. The next prime is 21140123. The reversal of 21140116 is 61104112.

It can be written as a sum of positive squares in 2 ways, for example, as 7817616 + 13322500 = 2796^2 + 3650^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 21140116.

It is a congruent number.

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, 2721 + ... + 7048.

Almost surely, 2^21140116 is an apocalyptic number.

It is an amenable number.

21140116 is a deficient number, since it is larger than the sum of its proper divisors (15927264).

21140116 is a wasteful number, since it uses less digits than its factorization.

21140116 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10314 (or 10312 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 16.

The square root of 21140116 is about 4597.8381876704. The cubic root of 21140116 is about 276.5046602378.

Adding to 21140116 its reverse (61104112), we get a palindrome (82244228).

The spelling of 21140116 in words is "twenty-one million, one hundred forty thousand, one hundred sixteen".