210005821320 has 64 divisors (see below), whose sum is σ = 632243776320. Its totient is φ = 55803657984.

The previous prime is 210005821313. The next prime is 210005821321. The reversal of 210005821320 is 23128500012.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is not an unprimeable number, because it can be changed into a prime (210005821321) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3057999 + ... + 3125918.

It is an arithmetic number, because the mean of its divisors is an integer number (9878809005).

Almost surely, 2^210005821320 is an apocalyptic number.

210005821320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

210005821320 is an abundant number, since it is smaller than the sum of its proper divisors (422237955000).

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

210005821320 is a wasteful number, since it uses less digits than its factorization.

210005821320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6184214 (or 6184210 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 24.

The spelling of 210005821320 in words is "two hundred ten billion, five million, eight hundred twenty-one thousand, three hundred twenty".