21320133000 has 256 divisors, whose sum is σ = 69144192000. Its totient is φ = 5462912000.

The previous prime is 21320132993. The next prime is 21320133077. The reversal of 21320133000 is 33102312.

It is a super-2 number, since 2×21320133000² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 23402545 + ... + 23403455.

It is an arithmetic number, because the mean of its divisors is an integer number (270094500).

Almost surely, 2^21320133000 is an apocalyptic number.

21320133000 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 21320133000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34572096000).

21320133000 is an abundant number, since it is smaller than the sum of its proper divisors (47824059000).

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

21320133000 is a wasteful number, since it uses less digits than its factorization.

21320133000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1233 (or 1219 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 15.

Adding to 21320133000 its reverse (33102312), we get a palindrome (21353235312).

The spelling of 21320133000 in words is "twenty-one billion, three hundred twenty million, one hundred thirty-three thousand".