21130356000 has 384 divisors, whose sum is σ = 78482476800. Its totient is φ = 4926873600.

The previous prime is 21130355977. The next prime is 21130356007. The reversal of 21130356000 is 65303112.

It is not an unprimeable number, because it can be changed into a prime (21130356007) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 2960436 + ... + 2967564.

It is an arithmetic number, because the mean of its divisors is an integer number (204381450).

Almost surely, 2^21130356000 is an apocalyptic number.

21130356000 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 21130356000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (39241238400).

21130356000 is an abundant number, since it is smaller than the sum of its proper divisors (57352120800).

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

21130356000 is a wasteful number, since it uses less digits than its factorization.

21130356000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7189 (or 7171 counting only the distinct ones).

The product of its (nonzero) digits is 540, while the sum is 21.

Adding to 21130356000 its reverse (65303112), we get a palindrome (21195659112).

The spelling of 21130356000 in words is "twenty-one billion, one hundred thirty million, three hundred fifty-six thousand".