2640002023 has 4 divisors (see below), whose sum is σ = 2684747880. Its totient is φ = 2595256168.

The previous prime is 2640001993. The next prime is 2640002033. The reversal of 2640002023 is 3202000462.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3202000462 = 2 ⋅1601000231.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2640002023 is a prime.

It is a super-2 number, since 2×2640002023² = 13939221362888185058, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2640002033) 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, 22372840 + ... + 22372957.

It is an arithmetic number, because the mean of its divisors is an integer number (671186970).

Almost surely, 2^2640002023 is an apocalyptic number.

2640002023 is a deficient number, since it is larger than the sum of its proper divisors (44745857).

2640002023 is an equidigital number, since it uses as much as digits as its factorization.

2640002023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44745856.

The product of its (nonzero) digits is 576, while the sum is 19.

The square root of 2640002023 is about 51380.9500009488. The cubic root of 2640002023 is about 1382.0849990271.

Adding to 2640002023 its reverse (3202000462), we get a palindrome (5842002485).

The spelling of 2640002023 in words is "two billion, six hundred forty million, two thousand, twenty-three".