202321210340 has 96 divisors (see below), whose sum is σ = 453705325920. Its totient is φ = 75638513664.

The previous prime is 202321210261. The next prime is 202321210397. The reversal of 202321210340 is 43012123202.

It can be written as a sum of positive squares in 16 ways, for example, as 2933955556 + 199387254784 = 54166^2 + 446528^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4203692 + ... + 4251548.

It is an arithmetic number, because the mean of its divisors is an integer number (4726097145).

Almost surely, 2^202321210340 is an apocalyptic number.

202321210340 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 202321210340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (226852662960).

202321210340 is an abundant number, since it is smaller than the sum of its proper divisors (251384115580).

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

202321210340 is a wasteful number, since it uses less digits than its factorization.

202321210340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48129 (or 48127 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 20.

Adding to 202321210340 its reverse (43012123202), we get a palindrome (245333333542).

The spelling of 202321210340 in words is "two hundred two billion, three hundred twenty-one million, two hundred ten thousand, three hundred forty".