200919994081 has 3 divisors (see below), whose sum is σ = 200920442323. Its totient is φ = 200919545840.

The previous prime is 200919994057. The next prime is 200919994117. The reversal of 200919994081 is 180499919002.

The square root of 200919994081 is 448241.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 68744120481 + 132175873600 = 262191^2 + 363560^2 .

It is not a de Polignac number, because 200919994081 - 2¹⁵ = 200919961313 is a prime.

It is a super-2 number, since 2×200919994081² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (200919994031) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 224121 + ... + 672361.

Almost surely, 2^200919994081 is an apocalyptic number.

200919994081 is the 448241-st square number.

200919994081 is the 224121-st centered octagonal number.

It is an amenable number.

200919994081 is a deficient number, since it is larger than the sum of its proper divisors (448242).

200919994081 is an frugal number, since it uses more digits than its factorization.

200919994081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 896482 (or 448241 counting only the distinct ones).

The product of its (nonzero) digits is 419904, while the sum is 52.

The spelling of 200919994081 in words is "two hundred billion, nine hundred nineteen million, nine hundred ninety-four thousand, eighty-one".