21325426 has 8 divisors (see below), whose sum is σ = 32017500. Its totient is φ = 10652928.

The previous prime is 21325397. The next prime is 21325433. The reversal of 21325426 is 62452312.

It can be written as a sum of positive squares in 2 ways, for example, as 20693401 + 632025 = 4549^2 + 795^2 .

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

It is a self number, because there is not a number n which added to its sum of digits gives 21325426.

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, 1771 + ... + 6766.

Almost surely, 2^21325426 is an apocalyptic number.

21325426 is a deficient number, since it is larger than the sum of its proper divisors (10692074).

21325426 is a wasteful number, since it uses less digits than its factorization.

21325426 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9788.

The product of its digits is 2880, while the sum is 25.

The square root of 21325426 is about 4617.9460802396. The cubic root of 21325426 is about 277.3102390137.

Adding to 21325426 its reverse (62452312), we get a palindrome (83777738).

The spelling of 21325426 in words is "twenty-one million, three hundred twenty-five thousand, four hundred twenty-six".