21320213000 has 32 divisors (see below), whose sum is σ = 49889300760. Its totient is φ = 8528084800.

The previous prime is 21320212993. The next prime is 21320213003. The reversal of 21320213000 is 31202312.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 11188985284 + 10131227716 = 105778^2 + 100654^2 .

It is not an unprimeable number, because it can be changed into a prime (21320213003) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10659107 + ... + 10661106.

Almost surely, 2^21320213000 is an apocalyptic number.

21320213000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21320213000 is an abundant number, since it is smaller than the sum of its proper divisors (28569087760).

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

21320213000 is a wasteful number, since it uses less digits than its factorization.

21320213000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21320234 (or 21320220 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 14.

Adding to 21320213000 its reverse (31202312), we get a palindrome (21351415312).

The spelling of 21320213000 in words is "twenty-one billion, three hundred twenty million, two hundred thirteen thousand".