21014785 has 8 divisors (see below), whose sum is σ = 27510336. Its totient is φ = 15283440.

The previous prime is 21014761. The next prime is 21014803. The reversal of 21014785 is 58741012.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 21014785 - 2⁵ = 21014753 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a Duffinian 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, 190989 + ... + 191098.

It is an arithmetic number, because the mean of its divisors is an integer number (3438792).

Almost surely, 2^21014785 is an apocalyptic number.

It is an amenable number.

21014785 is a deficient number, since it is larger than the sum of its proper divisors (6495551).

21014785 is a wasteful number, since it uses less digits than its factorization.

21014785 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 382103.

The product of its (nonzero) digits is 2240, while the sum is 28.

The square root of 21014785 is about 4584.1885868712. The cubic root of 21014785 is about 275.9571495823.

Adding to 21014785 its reverse (58741012), we get a palindrome (79755797).

It can be divided in two parts, 2101 and 4785, that added together give a palindrome (6886).

The spelling of 21014785 in words is "twenty-one million, fourteen thousand, seven hundred eighty-five".