21055034000 has 480 divisors, whose sum is σ = 68816666880. Its totient is φ = 6050304000.

The previous prime is 21055033949. The next prime is 21055034017. The reversal of 21055034000 is 43055012.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 26025596 + ... + 26026404.

It is an arithmetic number, because the mean of its divisors is an integer number (143368056).

Almost surely, 2^21055034000 is an apocalyptic number.

21055034000 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 21055034000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34408333440).

21055034000 is an abundant number, since it is smaller than the sum of its proper divisors (47761632880).

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

21055034000 is a wasteful number, since it uses less digits than its factorization.

21055034000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 876 (or 847 counting only the distinct ones).

The product of its (nonzero) digits is 600, while the sum is 20.

Adding to 21055034000 its reverse (43055012), we get a palindrome (21098089012).

The spelling of 21055034000 in words is "twenty-one billion, fifty-five million, thirty-four thousand".