21611014 has 4 divisors (see below), whose sum is σ = 32416524. Its totient is φ = 10805506.

The previous prime is 21611011. The next prime is 21611017. The reversal of 21611014 is 41011612.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (21611011) and next prime (21611017).

It is a super-2 number, since 2×21611014² = 934071852216392, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21611011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5402752 + ... + 5402755.

It is an arithmetic number, because the mean of its divisors is an integer number (8104131).

Almost surely, 2^21611014 is an apocalyptic number.

21611014 is a deficient number, since it is larger than the sum of its proper divisors (10805510).

21611014 is a wasteful number, since it uses less digits than its factorization.

21611014 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10805509.

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

The square root of 21611014 is about 4648.7647821760. The cubic root of 21611014 is about 278.5426575840.

Adding to 21611014 its reverse (41011612), we get a palindrome (62622626).

The spelling of 21611014 in words is "twenty-one million, six hundred eleven thousand, fourteen".