21341491200 has 780 divisors, whose sum is σ = 82587297408. Its totient is φ = 5441126400.

The previous prime is 21341491189. The next prime is 21341491217. The reversal of 21341491200 is 219414312.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 257126359 + ... + 257126441.

Almost surely, 2^21341491200 is an apocalyptic number.

21341491200 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 21341491200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (41293648704).

21341491200 is an abundant number, since it is smaller than the sum of its proper divisors (61245806208).

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

21341491200 is an equidigital number, since it uses as much as digits as its factorization.

21341491200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 160 (or 124 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 27.

The spelling of 21341491200 in words is "twenty-one billion, three hundred forty-one million, four hundred ninety-one thousand, two hundred".