21003104243023 has 16 divisors (see below), whose sum is σ = 24093044462080. Its totient is φ = 17935656919200.

The previous prime is 21003104242963. The next prime is 21003104243039. The reversal of 21003104243023 is 32034240130012.

It is a cyclic number.

It is not a de Polignac number, because 21003104243023 - 2¹³ = 21003104234831 is a prime.

It is a super-2 number, since 2×21003104243023² (a number of 27 digits) 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 (21003104273023) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2822088 + ... + 7068973.

It is an arithmetic number, because the mean of its divisors is an integer number (1505815278880).

Almost surely, 2^{21003104243023} is an apocalyptic number.

21003104243023 is a deficient number, since it is larger than the sum of its proper divisors (3089940219057).

21003104243023 is an equidigital number, since it uses as much as digits as its factorization.

21003104243023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9892198.

The product of its (nonzero) digits is 3456, while the sum is 25.

Adding to 21003104243023 its reverse (32034240130012), we get a palindrome (53037344373035).

The spelling of 21003104243023 in words is "twenty-one trillion, three billion, one hundred four million, two hundred forty-three thousand, twenty-three".