21050098 has 8 divisors (see below), whose sum is σ = 31598208. Its totient is φ = 10517364.

The previous prime is 21050059. The next prime is 21050101. The reversal of 21050098 is 89005012.

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 (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 615 + ... + 6517.

It is an arithmetic number, because the mean of its divisors is an integer number (3949776).

Almost surely, 2^21050098 is an apocalyptic number.

21050098 is a deficient number, since it is larger than the sum of its proper divisors (10548110).

21050098 is a wasteful number, since it uses less digits than its factorization.

21050098 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7688.

The product of its (nonzero) digits is 720, while the sum is 25.

The square root of 21050098 is about 4588.0385787393. The cubic root of 21050098 is about 276.1116348097. Note that the first 3 decimals are identical.

The spelling of 21050098 in words is "twenty-one million, fifty thousand, ninety-eight".