20202001091 has 8 divisors (see below), whose sum is σ = 20422305984. Its totient is φ = 19982871720.

The previous prime is 20202001081. The next prime is 20202001103. The reversal of 20202001091 is 19010020202.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20202001091 - 2²² = 20197806787 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20202001021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 259301 + ... + 328086.

It is an arithmetic number, because the mean of its divisors is an integer number (2552788248).

Almost surely, 2^20202001091 is an apocalyptic number.

20202001091 is a deficient number, since it is larger than the sum of its proper divisors (220304893).

20202001091 is a wasteful number, since it uses less digits than its factorization.

20202001091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 587761.

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 20202001091 its reverse (19010020202), we get a palindrome (39212021293).

The spelling of 20202001091 in words is "twenty billion, two hundred two million, one thousand, ninety-one".