21113996 has 6 divisors (see below), whose sum is σ = 36949500. Its totient is φ = 10556996.

The previous prime is 21113993. The next prime is 21113999. The reversal of 21113996 is 69931112.

It is an interprime number because it is at equal distance from previous prime (21113993) and next prime (21113999).

It is not an unprimeable number, because it can be changed into a prime (21113993) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2639246 + ... + 2639253.

It is an arithmetic number, because the mean of its divisors is an integer number (6158250).

Almost surely, 2^21113996 is an apocalyptic number.

It is an amenable number.

21113996 is a deficient number, since it is larger than the sum of its proper divisors (15835504).

21113996 is a wasteful number, since it uses less digits than its factorization.

21113996 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5278503 (or 5278501 counting only the distinct ones).

The product of its digits is 2916, while the sum is 32.

The square root of 21113996 is about 4594.9968443950. The cubic root of 21113996 is about 276.3907334218.

The spelling of 21113996 in words is "twenty-one million, one hundred thirteen thousand, nine hundred ninety-six".