21461426 has 16 divisors (see below), whose sum is σ = 36900096. Its totient is φ = 9170496.

The previous prime is 21461417. The next prime is 21461437. The reversal of 21461426 is 62416412.

It is a junction number, because it is equal to n+sod(n) for n = 21461395 and 21461404.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3050 + ... + 7226.

It is an arithmetic number, because the mean of its divisors is an integer number (2306256).

Almost surely, 2^21461426 is an apocalyptic number.

21461426 is a deficient number, since it is larger than the sum of its proper divisors (15438670).

21461426 is a wasteful number, since it uses less digits than its factorization.

21461426 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4553.

The product of its digits is 2304, while the sum is 26.

The square root of 21461426 is about 4632.6478389793. The cubic root of 21461426 is about 277.8984930378.

Adding to 21461426 its reverse (62416412), we get a palindrome (83877838).

The spelling of 21461426 in words is "twenty-one million, four hundred sixty-one thousand, four hundred twenty-six".