21650552050 has 48 divisors (see below), whose sum is σ = 42043862592. Its totient is φ = 8279163200.

The previous prime is 21650552029. The next prime is 21650552051. The reversal of 21650552050 is 5025505612.

It is not an unprimeable number, because it can be changed into a prime (21650552051) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 2734197 + ... + 2742103.

It is an arithmetic number, because the mean of its divisors is an integer number (875913804).

Almost surely, 2^21650552050 is an apocalyptic number.

21650552050 is a deficient number, since it is larger than the sum of its proper divisors (20393310542).

21650552050 is a wasteful number, since it uses less digits than its factorization.

21650552050 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10323 (or 10318 counting only the distinct ones).

The product of its (nonzero) digits is 15000, while the sum is 31.

The spelling of 21650552050 in words is "twenty-one billion, six hundred fifty million, five hundred fifty-two thousand, fifty".