21796254 has 12 divisors (see below), whose sum is σ = 47225256. Its totient is φ = 7265412.

The previous prime is 21796253. The next prime is 21796279. The reversal of 21796254 is 45269712.

21796254 is a `hidden beast` number, since 21 + 7 + 9 + 625 + 4 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21796253) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 605434 + ... + 605469.

It is an arithmetic number, because the mean of its divisors is an integer number (3935438).

Almost surely, 2^21796254 is an apocalyptic number.

21796254 is an abundant number, since it is smaller than the sum of its proper divisors (25429002).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21796254 is a wasteful number, since it uses less digits than its factorization.

21796254 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1210911 (or 1210908 counting only the distinct ones).

The product of its digits is 30240, while the sum is 36.

The square root of 21796254 is about 4668.6458422116. The cubic root of 21796254 is about 279.3362423900.

The spelling of 21796254 in words is "twenty-one million, seven hundred ninety-six thousand, two hundred fifty-four".