21515050233350 has 24 divisors (see below), whose sum is σ = 40018458473928. Its totient is φ = 8605920084800.

The previous prime is 21515050233337. The next prime is 21515050233401. The reversal of 21515050233350 is 5333205051512.

It is a self number, because there is not a number n which added to its sum of digits gives 21515050233350.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1922930 + ... + 6835770.

It is an arithmetic number, because the mean of its divisors is an integer number (1667435769747).

Almost surely, 2^{21515050233350} is an apocalyptic number.

21515050233350 is a deficient number, since it is larger than the sum of its proper divisors (18503408240578).

21515050233350 is a wasteful number, since it uses less digits than its factorization.

21515050233350 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5000440 (or 5000435 counting only the distinct ones).

The product of its (nonzero) digits is 67500, while the sum is 35.

Adding to 21515050233350 its reverse (5333205051512), we get a palindrome (26848255284862).

The spelling of 21515050233350 in words is "twenty-one trillion, five hundred fifteen billion, fifty million, two hundred thirty-three thousand, three hundred fifty".