21004314503 has 16 divisors (see below), whose sum is σ = 22992076800. Its totient is φ = 19111972320.

The previous prime is 21004314493. The next prime is 21004314547. The reversal of 21004314503 is 30541340012.

It is not a de Polignac number, because 21004314503 - 2¹⁰ = 21004313479 is a prime.

It is a super-2 number, since 2×21004314503² (a number of 21 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 (21004314563) 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, 5450 + ... + 205032.

It is an arithmetic number, because the mean of its divisors is an integer number (1437004800).

Almost surely, 2^21004314503 is an apocalyptic number.

21004314503 is a deficient number, since it is larger than the sum of its proper divisors (1987762297).

21004314503 is a wasteful number, since it uses less digits than its factorization.

21004314503 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 199822.

The product of its (nonzero) digits is 1440, while the sum is 23.

Adding to 21004314503 its reverse (30541340012), we get a palindrome (51545654515).

The spelling of 21004314503 in words is "twenty-one billion, four million, three hundred fourteen thousand, five hundred three".