21413414 has 32 divisors (see below), whose sum is σ = 37013760. Its totient is φ = 9196000.

The previous prime is 21413393. The next prime is 21413423. The reversal of 21413414 is 41431412.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 50897 + ... + 51315.

It is an arithmetic number, because the mean of its divisors is an integer number (1156680).

Almost surely, 2^21413414 is an apocalyptic number.

21413414 is a deficient number, since it is larger than the sum of its proper divisors (15600346).

21413414 is a wasteful number, since it uses less digits than its factorization.

21413414 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 556.

The product of its digits is 384, while the sum is 20.

The square root of 21413414 is about 4627.4630198414. The cubic root of 21413414 is about 277.6911066252.

Adding to 21413414 its reverse (41431412), we get a palindrome (62844826).

It can be divided in two parts, 2141 and 3414, that added together give a palindrome (5555).

The spelling of 21413414 in words is "twenty-one million, four hundred thirteen thousand, four hundred fourteen".