20659198 has 32 divisors (see below), whose sum is σ = 37449216. Its totient is φ = 8356128.

The previous prime is 20659187. The next prime is 20659201. The reversal of 20659198 is 89195602.

It is a self number, because there is not a number n which added to its sum of digits gives 20659198.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26340 + ... + 27112.

It is an arithmetic number, because the mean of its divisors is an integer number (1170288).

Almost surely, 2^20659198 is an apocalyptic number.

20659198 is a deficient number, since it is larger than the sum of its proper divisors (16790018).

20659198 is a wasteful number, since it uses less digits than its factorization.

20659198 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 888.

The product of its (nonzero) digits is 38880, while the sum is 40.

The square root of 20659198 is about 4545.2390476189. The cubic root of 20659198 is about 274.3918151701.

The spelling of 20659198 in words is "twenty million, six hundred fifty-nine thousand, one hundred ninety-eight".