21320023103 has 8 divisors (see below), whose sum is σ = 21741504288. Its totient is φ = 20902040064.

The previous prime is 21320023093. The next prime is 21320023129. The reversal of 21320023103 is 30132002312.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21320023103 - 2²² = 21315828799 is a prime.

It is a super-2 number, since 2×21320023103² (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 (21320023163) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 862226 + ... + 886607.

It is an arithmetic number, because the mean of its divisors is an integer number (2717688036).

Almost surely, 2^21320023103 is an apocalyptic number.

21320023103 is a deficient number, since it is larger than the sum of its proper divisors (421481185).

21320023103 is a wasteful number, since it uses less digits than its factorization.

21320023103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1749073.

The product of its (nonzero) digits is 216, while the sum is 17.

Adding to 21320023103 its reverse (30132002312), we get a palindrome (51452025415).

The spelling of 21320023103 in words is "twenty-one billion, three hundred twenty million, twenty-three thousand, one hundred three".