21204103000 has 64 divisors (see below), whose sum is σ = 50129352000. Its totient is φ = 8394163200.

The previous prime is 21204102991. The next prime is 21204103021. The reversal of 21204103000 is 30140212.

It is a super-2 number, since 2×21204103000² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12300 + ... + 206299.

It is an arithmetic number, because the mean of its divisors is an integer number (783271125).

Almost surely, 2^21204103000 is an apocalyptic number.

21204103000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21204103000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25064676000).

21204103000 is an abundant number, since it is smaller than the sum of its proper divisors (28925249000).

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

21204103000 is a wasteful number, since it uses less digits than its factorization.

21204103000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 218717 (or 218703 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 13.

Adding to 21204103000 its reverse (30140212), we get a palindrome (21234243212).

The spelling of 21204103000 in words is "twenty-one billion, two hundred four million, one hundred three thousand".