21068098 has 8 divisors (see below), whose sum is σ = 31625100. Its totient is φ = 10526400.

The previous prime is 21068087. The next prime is 21068101. The reversal of 21068098 is 89086012.

It can be written as a sum of positive squares in 2 ways, for example, as 19333609 + 1734489 = 4397^2 + 1317^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 678 + ... + 6526.

Almost surely, 2^21068098 is an apocalyptic number.

21068098 is a deficient number, since it is larger than the sum of its proper divisors (10557002).

21068098 is a wasteful number, since it uses less digits than its factorization.

21068098 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7652.

The product of its (nonzero) digits is 6912, while the sum is 34.

The square root of 21068098 is about 4589.9997821351. Note that the first 3 decimals coincide. The cubic root of 21068098 is about 276.1903136750.

The spelling of 21068098 in words is "twenty-one million, sixty-eight thousand, ninety-eight".