21949276 has 12 divisors (see below), whose sum is σ = 38455200. Its totient is φ = 10962080.

The previous prime is 21949273. The next prime is 21949303. The reversal of 21949276 is 67294912.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21949273) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1581 + ... + 6811.

It is an arithmetic number, because the mean of its divisors is an integer number (3204600).

Almost surely, 2^21949276 is an apocalyptic number.

It is an amenable number.

21949276 is a deficient number, since it is larger than the sum of its proper divisors (16505924).

21949276 is a wasteful number, since it uses less digits than its factorization.

21949276 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6284 (or 6282 counting only the distinct ones).

The product of its digits is 54432, while the sum is 40.

The square root of 21949276 is about 4685.0054428997. The cubic root of 21949276 is about 279.9884178883.

The spelling of 21949276 in words is "twenty-one million, nine hundred forty-nine thousand, two hundred seventy-six".