21042414 has 12 divisors (see below), whose sum is σ = 45591936. Its totient is φ = 7014132.

The previous prime is 21042407. The next prime is 21042419. The reversal of 21042414 is 41424012.

21042414 is a `hidden beast` number, since 210 + 42 + 414 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18), and also a Moran number because the ratio is a prime number: 1169023 = 21042414 / (2 + 1 + 0 + 4 + 2 + 4 + 1 + 4).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21042419) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 584494 + ... + 584529.

It is an arithmetic number, because the mean of its divisors is an integer number (3799328).

Almost surely, 2^21042414 is an apocalyptic number.

21042414 is an abundant number, since it is smaller than the sum of its proper divisors (24549522).

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

21042414 is a wasteful number, since it uses less digits than its factorization.

21042414 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1169031 (or 1169028 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 18.

The square root of 21042414 is about 4587.2011074292. The cubic root of 21042414 is about 276.0780340159.

Adding to 21042414 its reverse (41424012), we get a palindrome (62466426).

It can be divided in two parts, 210 and 42414, that added together give a palindrome (42624).

The spelling of 21042414 in words is "twenty-one million, forty-two thousand, four hundred fourteen".