2040420423445 has 4 divisors (see below), whose sum is σ = 2448504508140. Its totient is φ = 1632336338752.

The previous prime is 2040420423443. The next prime is 2040420423473. The reversal of 2040420423445 is 5443240240402.

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 329574735396 + 1710845688049 = 574086^2 + 1307993^2 .

It is a cyclic number.

It is not a de Polignac number, because 2040420423445 - 2¹ = 2040420423443 is a prime.

It is a super-3 number, since 3×2040420423445³ (a number of 38 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a self number, because there is not a number n which added to its sum of digits gives 2040420423445.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2040420423443) 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, 204042042340 + ... + 204042042349.

It is an arithmetic number, because the mean of its divisors is an integer number (612126127035).

Almost surely, 2^{2040420423445} is an apocalyptic number.

It is an amenable number.

2040420423445 is a deficient number, since it is larger than the sum of its proper divisors (408084084695).

2040420423445 is an equidigital number, since it uses as much as digits as its factorization.

2040420423445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 408084084694.

The product of its (nonzero) digits is 122880, while the sum is 34.

Adding to 2040420423445 its reverse (5443240240402), we get a palindrome (7483660663847).

The spelling of 2040420423445 in words is "two trillion, forty billion, four hundred twenty million, four hundred twenty-three thousand, four hundred forty-five".