21103314320 has 40 divisors (see below), whose sum is σ = 53525681280. Its totient is φ = 7673932160.

The previous prime is 21103314313. The next prime is 21103314343. The reversal of 21103314320 is 2341330112.

It is a tau number, because it is divible by the number of its divisors (40).

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 21103314292 and 21103314301.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11989640 + ... + 11991399.

It is an arithmetic number, because the mean of its divisors is an integer number (1338142032).

Almost surely, 2^21103314320 is an apocalyptic number.

21103314320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21103314320 is an abundant number, since it is smaller than the sum of its proper divisors (32422366960).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21103314320 is a wasteful number, since it uses less digits than its factorization.

21103314320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23981063 (or 23981057 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 21103314320 its reverse (2341330112), we get a palindrome (23444644432).

The spelling of 21103314320 in words is "twenty-one billion, one hundred three million, three hundred fourteen thousand, three hundred twenty".