21303203140250 has 32 divisors (see below), whose sum is σ = 39911992952832. Its totient is φ = 8514358890000.

The previous prime is 21303203140231. The next prime is 21303203140277. The reversal of 21303203140250 is 5204130230312.

It is a happy number.

It is a super-2 number, since 2×21303203140250² (a number of 27 digits) contains 22 as substring.

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, 34303466 + ... + 34918965.

It is an arithmetic number, because the mean of its divisors is an integer number (1247249779776).

Almost surely, 2^{21303203140250} is an apocalyptic number.

21303203140250 is a deficient number, since it is larger than the sum of its proper divisors (18608789812582).

21303203140250 is a wasteful number, since it uses less digits than its factorization.

21303203140250 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69223679 (or 69223669 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 26.

Adding to 21303203140250 its reverse (5204130230312), we get a palindrome (26507333370562).

The spelling of 21303203140250 in words is "twenty-one trillion, three hundred three billion, two hundred three million, one hundred forty thousand, two hundred fifty".