16503440006023 has 4 divisors (see below), whose sum is σ = 16814825666568. Its totient is φ = 16192054345480.

The previous prime is 16503440005951. The next prime is 16503440006033. The reversal of 16503440006023 is 32060004430561.

16503440006023 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 16503440006023 - 2⁹ = 16503440005511 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 16503440006023.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16503440006033) 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, 155692830193 + ... + 155692830298.

It is an arithmetic number, because the mean of its divisors is an integer number (4203706416642).

Almost surely, 2^{16503440006023} is an apocalyptic number.

16503440006023 is a deficient number, since it is larger than the sum of its proper divisors (311385660545).

16503440006023 is an equidigital number, since it uses as much as digits as its factorization.

16503440006023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 311385660544.

The product of its (nonzero) digits is 51840, while the sum is 34.

Adding to 16503440006023 its reverse (32060004430561), we get a palindrome (48563444436584).

The spelling of 16503440006023 in words is "sixteen trillion, five hundred three billion, four hundred forty million, six thousand, twenty-three".