21219098 has 8 divisors (see below), whose sum is σ = 31849140. Its totient is φ = 10602720.

The previous prime is 21219091. The next prime is 21219109. The reversal of 21219098 is 89091212.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 20367169 + 851929 = 4513^2 + 923^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (21219091) 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, 2558 + ... + 6998.

Almost surely, 2^21219098 is an apocalyptic number.

21219098 is a deficient number, since it is larger than the sum of its proper divisors (10630042).

21219098 is a wasteful number, since it uses less digits than its factorization.

21219098 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6832.

The product of its (nonzero) digits is 2592, while the sum is 32.

The square root of 21219098 is about 4606.4192167018. The cubic root of 21219098 is about 276.8485837655.

The spelling of 21219098 in words is "twenty-one million, two hundred nineteen thousand, ninety-eight".