21414442 has 8 divisors (see below), whose sum is σ = 36710496. Its totient is φ = 9177612.

The previous prime is 21414431. The next prime is 21414457. The reversal of 21414442 is 24441412.

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

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, 764788 + ... + 764815.

It is an arithmetic number, because the mean of its divisors is an integer number (4588812).

Almost surely, 2^21414442 is an apocalyptic number.

21414442 is a deficient number, since it is larger than the sum of its proper divisors (15296054).

21414442 is a wasteful number, since it uses less digits than its factorization.

21414442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1529612.

The product of its digits is 1024, while the sum is 22.

The square root of 21414442 is about 4627.5740944905. The cubic root of 21414442 is about 277.6955502867.

Adding to 21414442 its reverse (24441412), we get a palindrome (45855854).

The spelling of 21414442 in words is "twenty-one million, four hundred fourteen thousand, four hundred forty-two".