200618690 has 16 divisors (see below), whose sum is σ = 363751992. Its totient is φ = 79661184.

The previous prime is 200618689. The next prime is 200618707. The reversal of 200618690 is 96816002.

It can be written as a sum of positive squares in 4 ways, for example, as 189255049 + 11363641 = 13757^2 + 3371^2 .

It is a super-2 number, since 2×200618690² = 80495717554632200, which contains 22 as substring.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 71849 + ... + 74588.

Almost surely, 2^200618690 is an apocalyptic number.

200618690 is a deficient number, since it is larger than the sum of its proper divisors (163133302).

200618690 is a wasteful number, since it uses less digits than its factorization.

200618690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 146581.

The product of its (nonzero) digits is 5184, while the sum is 32.

The square root of 200618690 is about 14163.9927280411. The cubic root of 200618690 is about 585.4059470829.

The spelling of 200618690 in words is "two hundred million, six hundred eighteen thousand, six hundred ninety".