21452426 has 8 divisors (see below), whose sum is σ = 32410560. Its totient is φ = 10648908.

The previous prime is 21452413. The next prime is 21452443. The reversal of 21452426 is 62425412.

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 = 21452395 and 21452404.

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, 38306 + ... + 38861.

It is an arithmetic number, because the mean of its divisors is an integer number (4051320).

Almost surely, 2^21452426 is an apocalyptic number.

21452426 is a deficient number, since it is larger than the sum of its proper divisors (10958134).

21452426 is a wasteful number, since it uses less digits than its factorization.

21452426 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77308.

The product of its digits is 3840, while the sum is 26.

The square root of 21452426 is about 4631.6763703869. The cubic root of 21452426 is about 277.8596413769.

Adding to 21452426 its reverse (62425412), we get a palindrome (83877838).

The spelling of 21452426 in words is "twenty-one million, four hundred fifty-two thousand, four hundred twenty-six".