202002011993 has 4 divisors (see below), whose sum is σ = 204084507060. Its totient is φ = 199919516928.

The previous prime is 202002011989. The next prime is 202002012011. The reversal of 202002011993 is 399110200202.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 51389716249 + 150612295744 = 226693^2 + 388088^2 .

It is a cyclic number.

It is not a de Polignac number, because 202002011993 - 2² = 202002011989 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (202002011593) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1041247388 + ... + 1041247581.

It is an arithmetic number, because the mean of its divisors is an integer number (51021126765).

Almost surely, 2^202002011993 is an apocalyptic number.

It is an amenable number.

202002011993 is a deficient number, since it is larger than the sum of its proper divisors (2082495067).

202002011993 is an equidigital number, since it uses as much as digits as its factorization.

202002011993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2082495066.

The product of its (nonzero) digits is 1944, while the sum is 29.

The spelling of 202002011993 in words is "two hundred two billion, two million, eleven thousand, nine hundred ninety-three".