21302103504 has 80 divisors (see below), whose sum is σ = 63564592320. Its totient is φ = 6075463680.

The previous prime is 21302103491. The next prime is 21302103523. The reversal of 21302103504 is 40530120312.

It is a super-2 number, since 2×21302103504² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1177639 + ... + 1195590.

It is an arithmetic number, because the mean of its divisors is an integer number (794557404).

Almost surely, 2^21302103504 is an apocalyptic number.

21302103504 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

21302103504 is an abundant number, since it is smaller than the sum of its proper divisors (42262488816).

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

21302103504 is a wasteful number, since it uses less digits than its factorization.

21302103504 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2373268 (or 2373262 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 21.

Adding to 21302103504 its reverse (40530120312), we get a palindrome (61832223816).

The spelling of 21302103504 in words is "twenty-one billion, three hundred two million, one hundred three thousand, five hundred four".