21150200345 has 16 divisors (see below), whose sum is σ = 26328395520. Its totient is φ = 16298505600.

The previous prime is 21150200339. The next prime is 21150200431. The reversal of 21150200345 is 54300205112.

It is not a de Polignac number, because 21150200345 - 2¹⁴ = 21150183961 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 21150200345.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 636791 + ... + 669180.

It is an arithmetic number, because the mean of its divisors is an integer number (1645524720).

Almost surely, 2^21150200345 is an apocalyptic number.

It is an amenable number.

21150200345 is a deficient number, since it is larger than the sum of its proper divisors (5178195175).

21150200345 is a wasteful number, since it uses less digits than its factorization.

21150200345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1306096.

The product of its (nonzero) digits is 1200, while the sum is 23.

Adding to 21150200345 its reverse (54300205112), we get a palindrome (75450405457).

The spelling of 21150200345 in words is "twenty-one billion, one hundred fifty million, two hundred thousand, three hundred forty-five".