21283663050 has 72 divisors (see below), whose sum is σ = 61580748684. Its totient is φ = 5239054080.

The previous prime is 21283663033. The next prime is 21283663057. The reversal of 21283663050 is 5036638212.

It is a happy number.

21283663050 is a `hidden beast` number, since 2 + 12 + 8 + 3 + 6 + 630 + 5 + 0 = 666.

It can be written as a sum of positive squares in 6 ways, for example, as 5805068481 + 15478594569 = 76191^2 + 124413^2 .

It is a junction number, because it is equal to n+sod(n) for n = 21283662996 and 21283663014.

It is not an unprimeable number, because it can be changed into a prime (21283663057) by changing a digit.

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 35 ways as a sum of consecutive naturals, for example, 1813267 + ... + 1824966.

Almost surely, 2^21283663050 is an apocalyptic number.

21283663050 is an abundant number, since it is smaller than the sum of its proper divisors (40297085634).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21283663050 is a wasteful number, since it uses less digits than its factorization.

21283663050 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3638264 (or 3638256 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 36.

The spelling of 21283663050 in words is "twenty-one billion, two hundred eighty-three million, six hundred sixty-three thousand, fifty".