21742414 has 8 divisors (see below), whose sum is σ = 32796360. Its totient is φ = 10810296.

The previous prime is 21742411. The next prime is 21742447. The reversal of 21742414 is 41424712.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21742411) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 30009 + ... + 30724.

It is an arithmetic number, because the mean of its divisors is an integer number (4099545).

Almost surely, 2^21742414 is an apocalyptic number.

21742414 is a deficient number, since it is larger than the sum of its proper divisors (11053946).

21742414 is a wasteful number, since it uses less digits than its factorization.

21742414 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60914.

The product of its digits is 1792, while the sum is 25.

The square root of 21742414 is about 4662.8761510467. The cubic root of 21742414 is about 279.1060520165.

The spelling of 21742414 in words is "twenty-one million, seven hundred forty-two thousand, four hundred fourteen".