21796227 has 24 divisors (see below), whose sum is σ = 34120944. Its totient is φ = 13353984.

The previous prime is 21796223. The next prime is 21796237. The reversal of 21796227 is 72269712.

21796227 is a `hidden beast` number, since 21 + 7 + 9 + 622 + 7 = 666.

It is not a de Polignac number, because 21796227 - 2² = 21796223 is a prime.

It is a super-2 number, since 2×21796227² = 950151022871058, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21796191 and 21796200.

It is not an unprimeable number, because it can be changed into a prime (21796223) 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 in 23 ways as a sum of consecutive naturals, for example, 4923 + ... + 8235.

It is an arithmetic number, because the mean of its divisors is an integer number (1421706).

Almost surely, 2^21796227 is an apocalyptic number.

21796227 is a deficient number, since it is larger than the sum of its proper divisors (12324717).

21796227 is a wasteful number, since it uses less digits than its factorization.

21796227 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3379 (or 3376 counting only the distinct ones).

The product of its digits is 21168, while the sum is 36.

The square root of 21796227 is about 4668.6429505800. The cubic root of 21796227 is about 279.3361270479.

The spelling of 21796227 in words is "twenty-one million, seven hundred ninety-six thousand, two hundred twenty-seven".