21203040354350 has 48 divisors (see below), whose sum is σ = 39621225412608. Its totient is φ = 8441751558240.

The previous prime is 21203040354343. The next prime is 21203040354367. The reversal of 21203040354350 is 5345304030212.

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 23 ways as a sum of consecutive naturals, for example, 66819767 + ... + 67136333.

It is an arithmetic number, because the mean of its divisors is an integer number (825442196096).

Almost surely, 2^{21203040354350} is an apocalyptic number.

21203040354350 is a deficient number, since it is larger than the sum of its proper divisors (18418185058258).

21203040354350 is a wasteful number, since it uses less digits than its factorization.

21203040354350 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 322809 (or 322804 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 32.

Adding to 21203040354350 its reverse (5345304030212), we get a palindrome (26548344384562).

The spelling of 21203040354350 in words is "twenty-one trillion, two hundred three billion, forty million, three hundred fifty-four thousand, three hundred fifty".