21303203140252 has 48 divisors (see below), whose sum is σ = 42816881076480. Its totient is φ = 9172210348800.

The previous prime is 21303203140231. The next prime is 21303203140277. The reversal of 21303203140252 is 25204130230312.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 21303203140252.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3452193 + ... + 7384039.

It is an arithmetic number, because the mean of its divisors is an integer number (892018355760).

Almost surely, 2^{21303203140252} is an apocalyptic number.

21303203140252 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

21303203140252 is an abundant number, since it is smaller than the sum of its proper divisors (21513677936228).

21303203140252 is a wasteful number, since it uses less digits than its factorization.

21303203140252 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3938362 (or 3938360 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 28.

Adding to 21303203140252 its reverse (25204130230312), we get a palindrome (46507333370564).

The spelling of 21303203140252 in words is "twenty-one trillion, three hundred three billion, two hundred three million, one hundred forty thousand, two hundred fifty-two".