21012614 has 16 divisors (see below), whose sum is σ = 36633600. Its totient is φ = 8852424.

The previous prime is 21012599. The next prime is 21012647. The reversal of 21012614 is 41621012.

It is a super-2 number, since 2×21012614² = 883059894225992, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21012592 and 21012601.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11894 + ... + 13545.

It is an arithmetic number, because the mean of its divisors is an integer number (2289600).

Almost surely, 2^21012614 is an apocalyptic number.

21012614 is a deficient number, since it is larger than the sum of its proper divisors (15620986).

21012614 is a wasteful number, since it uses less digits than its factorization.

21012614 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25507.

The product of its (nonzero) digits is 96, while the sum is 17.

The square root of 21012614 is about 4583.9517885772. The cubic root of 21012614 is about 275.9476463745.

Adding to 21012614 its reverse (41621012), we get a palindrome (62633626).

The spelling of 21012614 in words is "twenty-one million, twelve thousand, six hundred fourteen".