21041814 has 8 divisors (see below), whose sum is σ = 42083640. Its totient is φ = 7013936.

The previous prime is 21041807. The next prime is 21041821. The reversal of 21041814 is 41814012.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (21041807) and next prime (21041821).

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

21041814 is an admirable number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1753479 + ... + 1753490.

It is an arithmetic number, because the mean of its divisors is an integer number (5260455).

Almost surely, 2^21041814 is an apocalyptic number.

21041814 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21041814 is a wasteful number, since it uses less digits than its factorization.

21041814 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3506974.

The product of its (nonzero) digits is 256, while the sum is 21.

The square root of 21041814 is about 4587.1357076067. The cubic root of 21041814 is about 276.0754099761.

Adding to 21041814 its reverse (41814012), we get a palindrome (62855826).

It can be divided in two parts, 210 and 41814, that added together give a palindrome (42024).

The spelling of 21041814 in words is "twenty-one million, forty-one thousand, eight hundred fourteen".