21044312000 has 56 divisors (see below), whose sum is σ = 52116258480. Its totient is φ = 8417721600.

The previous prime is 21044311997. The next prime is 21044312039. The reversal of 21044312000 is 21344012.

It is a super-3 number, since 3×21044312000³ (a number of 32 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 21044312000.

It is a congruent number.

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, 1307270 + ... + 1323269.

Almost surely, 2^21044312000 is an apocalyptic number.

21044312000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21044312000 is an abundant number, since it is smaller than the sum of its proper divisors (31071946480).

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

21044312000 is an equidigital number, since it uses as much as digits as its factorization.

21044312000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2630566 (or 2630546 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 17.

Adding to 21044312000 its reverse (21344012), we get a palindrome (21065656012).

The spelling of 21044312000 in words is "twenty-one billion, forty-four million, three hundred twelve thousand".