21219076 has 12 divisors (see below), whose sum is σ = 37166080. Its totient is φ = 10600200.

The previous prime is 21219071. The next prime is 21219083. The reversal of 21219076 is 67091212.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (21219071) 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, 6445 + ... + 9163.

Almost surely, 2^21219076 is an apocalyptic number.

It is an amenable number.

21219076 is a deficient number, since it is larger than the sum of its proper divisors (15947004).

21219076 is a wasteful number, since it uses less digits than its factorization.

21219076 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4674 (or 4672 counting only the distinct ones).

The product of its (nonzero) digits is 1512, while the sum is 28.

The square root of 21219076 is about 4606.4168287292. The cubic root of 21219076 is about 276.8484880865.

The spelling of 21219076 in words is "twenty-one million, two hundred nineteen thousand, seventy-six".