21924749050 has 12 divisors (see below), whose sum is σ = 40780033326. Its totient is φ = 8769899600.

The previous prime is 21924749029. The next prime is 21924749089. The reversal of 21924749050 is 5094742912.

It can be written as a sum of positive squares in 3 ways, for example, as 19755145809 + 2169603241 = 140553^2 + 46579^2 .

It is a junction number, because it is equal to n+sod(n) for n = 21924748988 and 21924749006.

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 5 ways as a sum of consecutive naturals, for example, 219247441 + ... + 219247540.

Almost surely, 2^21924749050 is an apocalyptic number.

21924749050 is a deficient number, since it is larger than the sum of its proper divisors (18855284276).

21924749050 is a wasteful number, since it uses less digits than its factorization.

21924749050 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 438494993 (or 438494988 counting only the distinct ones).

The product of its (nonzero) digits is 181440, while the sum is 43.

The spelling of 21924749050 in words is "twenty-one billion, nine hundred twenty-four million, seven hundred forty-nine thousand, fifty".