200820146 has 4 divisors (see below), whose sum is σ = 301230222. Its totient is φ = 100410072.

The previous prime is 200820131. The next prime is 200820161. The reversal of 200820146 is 641028002.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 641028002 = 2 ⋅320514001.

It is an interprime number because it is at equal distance from previous prime (200820131) and next prime (200820161).

It can be written as a sum of positive squares in only one way, i.e., 200533921 + 286225 = 14161^2 + 535^2 .

It is a super-2 number, since 2×200820146² = 80657462078922632, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50205035 + ... + 50205038.

Almost surely, 2^200820146 is an apocalyptic number.

200820146 is a deficient number, since it is larger than the sum of its proper divisors (100410076).

200820146 is a wasteful number, since it uses less digits than its factorization.

200820146 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100410075.

The product of its (nonzero) digits is 768, while the sum is 23.

The square root of 200820146 is about 14171.1024976887. The cubic root of 200820146 is about 585.6018312703.

Adding to 200820146 its reverse (641028002), we get a palindrome (841848148).

The spelling of 200820146 in words is "two hundred million, eight hundred twenty thousand, one hundred forty-six".