2001010091923 has 8 divisors (see below), whose sum is σ = 2015520038000. Its totient is φ = 1986501777408.

The previous prime is 2001010091921. The next prime is 2001010091939. The reversal of 2001010091923 is 3291900101002.

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 2001010091923 - 2¹ = 2001010091921 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2001010091891 and 2001010091900.

It is not an unprimeable number, because it can be changed into a prime (2001010091921) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2110015 + ... + 2907607.

It is an arithmetic number, because the mean of its divisors is an integer number (251940004750).

Almost surely, 2^{2001010091923} is an apocalyptic number.

2001010091923 is a deficient number, since it is larger than the sum of its proper divisors (14509946077).

2001010091923 is a wasteful number, since it uses less digits than its factorization.

2001010091923 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 815781.

The product of its (nonzero) digits is 972, while the sum is 28.

Adding to 2001010091923 its reverse (3291900101002), we get a palindrome (5292910192925).

The spelling of 2001010091923 in words is "two trillion, one billion, ten million, ninety-one thousand, nine hundred twenty-three".