20617198 has 8 divisors (see below), whose sum is σ = 35343792. Its totient is φ = 8835936.

The previous prime is 20617151. The next prime is 20617213. The reversal of 20617198 is 89171602.

It is a happy number.

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

It is a congruent number.

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, 736315 + ... + 736342.

It is an arithmetic number, because the mean of its divisors is an integer number (4417974).

Almost surely, 2^20617198 is an apocalyptic number.

20617198 is a deficient number, since it is larger than the sum of its proper divisors (14726594).

20617198 is a wasteful number, since it uses less digits than its factorization.

20617198 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1472666.

The product of its (nonzero) digits is 6048, while the sum is 34.

The square root of 20617198 is about 4540.6164779686. The cubic root of 20617198 is about 274.2057434942.

The spelling of 20617198 in words is "twenty million, six hundred seventeen thousand, one hundred ninety-eight".