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20819198 = 214896991
BaseRepresentation
bin100111101101…
…0110011111110
31110011201120102
41033122303332
520312203243
62022121102
7341650241
oct117326376
943151512
1020819198
111082a854
126b80192
13440c26a
142a9d258
151c639b8
hex13dacfe

20819198 has 8 divisors (see below), whose sum is σ = 31254240. Its totient is φ = 10401120.

The previous prime is 20819173. The next prime is 20819213. The reversal of 20819198 is 89191802.

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 pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 518 + ... + 6473.

It is an arithmetic number, because the mean of its divisors is an integer number (3906780).

Almost surely, 220819198 is an apocalyptic number.

20819198 is a deficient number, since it is larger than the sum of its proper divisors (10435042).

20819198 is a wasteful number, since it uses less digits than its factorization.

20819198 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8482.

The product of its (nonzero) digits is 10368, while the sum is 38.

The square root of 20819198 is about 4562.8059349484. The cubic root of 20819198 is about 275.0983582048.

The spelling of 20819198 in words is "twenty million, eight hundred nineteen thousand, one hundred ninety-eight".

Divisors: 1 2 1489 2978 6991 13982 10409599 20819198