20098690 has 8 divisors (see below), whose sum is σ = 36177660. Its totient is φ = 8039472.

The previous prime is 20098681. The next prime is 20098693. The reversal of 20098690 is 9689002.

It can be written as a sum of positive squares in 2 ways, for example, as 20061441 + 37249 = 4479^2 + 193^2 .

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

It is a super-2 number, since 2×20098690² = 807914679432200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20098693) 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, 1004925 + ... + 1004944.

Almost surely, 2^20098690 is an apocalyptic number.

20098690 is a deficient number, since it is larger than the sum of its proper divisors (16078970).

20098690 is a wasteful number, since it uses less digits than its factorization.

20098690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2009876.

The product of its (nonzero) digits is 7776, while the sum is 34.

The square root of 20098690 is about 4483.1562542477. The cubic root of 20098690 is about 271.8875057444.

The spelling of 20098690 in words is "twenty million, ninety-eight thousand, six hundred ninety".