201011993 has 16 divisors (see below), whose sum is σ = 251099520. Its totient is φ = 156663936.

The previous prime is 201011983. The next prime is 201012047. The reversal of 201011993 is 399110102.

It is not a de Polignac number, because 201011993 - 2⁸ = 201011737 is a prime.

It is not an unprimeable number, because it can be changed into a prime (201011933) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 10388 + ... + 22581.

It is an arithmetic number, because the mean of its divisors is an integer number (15693720).

Almost surely, 2^201011993 is an apocalyptic number.

It is an amenable number.

201011993 is a deficient number, since it is larger than the sum of its proper divisors (50087527).

201011993 is a wasteful number, since it uses less digits than its factorization.

201011993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33056.

The product of its (nonzero) digits is 486, while the sum is 26.

The square root of 201011993 is about 14177.8698329474. The cubic root of 201011993 is about 585.7882504791.

The spelling of 201011993 in words is "two hundred one million, eleven thousand, nine hundred ninety-three".