21254614 has 4 divisors (see below), whose sum is σ = 31881924. Its totient is φ = 10627306.

The previous prime is 21254581. The next prime is 21254617. The reversal of 21254614 is 41645212.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21254617) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5313652 + ... + 5313655.

It is an arithmetic number, because the mean of its divisors is an integer number (7970481).

Almost surely, 2^21254614 is an apocalyptic number.

21254614 is a deficient number, since it is larger than the sum of its proper divisors (10627310).

21254614 is a wasteful number, since it uses less digits than its factorization.

21254614 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10627309.

The product of its digits is 1920, while the sum is 25.

The square root of 21254614 is about 4610.2726600495. The cubic root of 21254614 is about 277.0029584326.

Adding to 21254614 its reverse (41645212), we get a palindrome (62899826).

The spelling of 21254614 in words is "twenty-one million, two hundred fifty-four thousand, six hundred fourteen".