21403200000 has 960 divisors, whose sum is σ = 89506771200. Its totient is φ = 4515840000.

The previous prime is 21403199927. The next prime is 21403200011. The reversal of 21403200000 is 230412.

It is a tau number, because it is divible by the number of its divisors (960).

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 1646399994 + ... + 1646400006.

It is an arithmetic number, because the mean of its divisors is an integer number (93236220).

Almost surely, 2^21403200000 is an apocalyptic number.

21403200000 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 21403200000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (44753385600).

21403200000 is an abundant number, since it is smaller than the sum of its proper divisors (68103571200).

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

21403200000 is an frugal number, since it uses more digits than its factorization.

21403200000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80 (or 30 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 12.

Adding to 21403200000 its reverse (230412), we get a palindrome (21403430412).

The spelling of 21403200000 in words is "twenty-one billion, four hundred three million, two hundred thousand".