21298082 has 8 divisors (see below), whose sum is σ = 34404636. Its totient is φ = 9829872.

The previous prime is 21298073. The next prime is 21298091. The reversal of 21298082 is 28089212.

It is an interprime number because it is at equal distance from previous prime (21298073) and next prime (21298091).

It can be written as a sum of positive squares in 2 ways, for example, as 21169201 + 128881 = 4601^2 + 359^2 .

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 409553 + ... + 409604.

Almost surely, 2^21298082 is an apocalyptic number.

21298082 is a deficient number, since it is larger than the sum of its proper divisors (13106554).

21298082 is a wasteful number, since it uses less digits than its factorization.

21298082 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 819172.

The product of its (nonzero) digits is 4608, while the sum is 32.

The square root of 21298082 is about 4614.9845070162. The cubic root of 21298082 is about 277.1916635876.

The spelling of 21298082 in words is "twenty-one million, two hundred ninety-eight thousand, eighty-two".