2040204323391 has 64 divisors (see below), whose sum is σ = 3115498764672. Its totient is φ = 1176467668992.

The previous prime is 2040204323389. The next prime is 2040204323407. The reversal of 2040204323391 is 1933234020402.

It is not a de Polignac number, because 2040204323391 - 2¹ = 2040204323389 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2040204323321) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 157501771 + ... + 157514723.

It is an arithmetic number, because the mean of its divisors is an integer number (48679668198).

Almost surely, 2^{2040204323391} is an apocalyptic number.

2040204323391 is a deficient number, since it is larger than the sum of its proper divisors (1075294441281).

2040204323391 is a wasteful number, since it uses less digits than its factorization.

2040204323391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14012.

The product of its (nonzero) digits is 31104, while the sum is 33.

Adding to 2040204323391 its reverse (1933234020402), we get a palindrome (3973438343793).

The spelling of 2040204323391 in words is "two trillion, forty billion, two hundred four million, three hundred twenty-three thousand, three hundred ninety-one".