21044353000 has 64 divisors (see below), whose sum is σ = 53720521920. Its totient is φ = 7652488000.

The previous prime is 21044352971. The next prime is 21044353039. The reversal of 21044353000 is 35344012.

It is a Harshad number since it is a multiple of its sum of digits (22).

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, 945562 + ... + 967561.

It is an arithmetic number, because the mean of its divisors is an integer number (839383155).

Almost surely, 2^21044353000 is an apocalyptic number.

21044353000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21044353000 is an abundant number, since it is smaller than the sum of its proper divisors (32676168920).

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

21044353000 is a wasteful number, since it uses less digits than its factorization.

21044353000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1913155 (or 1913141 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 22.

Adding to 21044353000 its reverse (35344012), we get a palindrome (21079697012).

The spelling of 21044353000 in words is "twenty-one billion, forty-four million, three hundred fifty-three thousand".