21052414 has 8 divisors (see below), whose sum is σ = 31628520. Its totient is φ = 10509576.

The previous prime is 21052411. The next prime is 21052469. The reversal of 21052414 is 41425012.

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

It is a junction number, because it is equal to n+sod(n) for n = 21052391 and 21052400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21052411) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6669 + ... + 9304.

It is an arithmetic number, because the mean of its divisors is an integer number (3953565).

Almost surely, 2^21052414 is an apocalyptic number.

21052414 is a deficient number, since it is larger than the sum of its proper divisors (10576106).

21052414 is a wasteful number, since it uses less digits than its factorization.

21052414 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16634.

The product of its (nonzero) digits is 320, while the sum is 19.

The square root of 21052414 is about 4588.2909672339. The cubic root of 21052414 is about 276.1217606707.

Adding to 21052414 its reverse (41425012), we get a palindrome (62477426).

The spelling of 21052414 in words is "twenty-one million, fifty-two thousand, four hundred fourteen".