2540021000005 has 4 divisors (see below), whose sum is σ = 3048025200012. Its totient is φ = 2032016800000.

The previous prime is 2540020999993. The next prime is 2540021000053. The reversal of 2540021000005 is 5000001200452.

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 2000439668161 + 539581331844 = 1414369^2 + 734562^2 .

It is not a de Polignac number, because 2540021000005 - 2²⁹ = 2539484129093 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 254002099996 + ... + 254002100005.

It is an arithmetic number, because the mean of its divisors is an integer number (762006300003).

Almost surely, 2^{2540021000005} is an apocalyptic number.

It is an amenable number.

2540021000005 is a deficient number, since it is larger than the sum of its proper divisors (508004200007).

2540021000005 is an equidigital number, since it uses as much as digits as its factorization.

2540021000005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 508004200006.

The product of its (nonzero) digits is 400, while the sum is 19.

Adding to 2540021000005 its reverse (5000001200452), we get a palindrome (7540022200457).

The spelling of 2540021000005 in words is "two trillion, five hundred forty billion, twenty-one million, five", and thus it is an aban number.