21611114 has 16 divisors (see below), whose sum is σ = 39227328. Its totient is φ = 8716992.

The previous prime is 21611087. The next prime is 21611143. The reversal of 21611114 is 41111612.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 21611092 and 21611101.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 45164 + ... + 45639.

It is an arithmetic number, because the mean of its divisors is an integer number (2451708).

Almost surely, 2^21611114 is an apocalyptic number.

21611114 is a deficient number, since it is larger than the sum of its proper divisors (17616214).

21611114 is a wasteful number, since it uses less digits than its factorization.

21611114 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90829.

The product of its digits is 48, while the sum is 17.

The square root of 21611114 is about 4648.7755377088. The cubic root of 21611114 is about 278.5430872141.

Adding to 21611114 its reverse (41111612), we get a palindrome (62722726).

The spelling of 21611114 in words is "twenty-one million, six hundred eleven thousand, one hundred fourteen".