21416998 has 8 divisors (see below), whose sum is σ = 32330592. Its totient is φ = 10640136.

The previous prime is 21416987. The next prime is 21416999. The reversal of 21416998 is 89961412.

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

It is a self number, because there is not a number n which added to its sum of digits gives 21416998.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21416999) 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 3 ways as a sum of consecutive naturals, for example, 33790 + ... + 34417.

It is an arithmetic number, because the mean of its divisors is an integer number (4041324).

Almost surely, 2^21416998 is an apocalyptic number.

21416998 is a deficient number, since it is larger than the sum of its proper divisors (10913594).

21416998 is a wasteful number, since it uses less digits than its factorization.

21416998 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68366.

The product of its digits is 31104, while the sum is 40.

The square root of 21416998 is about 4627.8502568687. The cubic root of 21416998 is about 277.7065983073.

The spelling of 21416998 in words is "twenty-one million, four hundred sixteen thousand, nine hundred ninety-eight".