21063770050 has 12 divisors (see below), whose sum is σ = 39178612386. Its totient is φ = 8425508000.

The previous prime is 21063770027. The next prime is 21063770059. The reversal of 21063770050 is 5007736012.

It can be written as a sum of positive squares in 3 ways, for example, as 18641260089 + 2422509961 = 136533^2 + 49219^2 .

It is a junction number, because it is equal to n+sod(n) for n = 21063769994 and 21063770021.

It is not an unprimeable number, because it can be changed into a prime (21063770059) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 210637651 + ... + 210637750.

Almost surely, 2^21063770050 is an apocalyptic number.

21063770050 is a deficient number, since it is larger than the sum of its proper divisors (18114842336).

21063770050 is a wasteful number, since it uses less digits than its factorization.

21063770050 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 421275413 (or 421275408 counting only the distinct ones).

The product of its (nonzero) digits is 8820, while the sum is 31.

The spelling of 21063770050 in words is "twenty-one billion, sixty-three million, seven hundred seventy thousand, fifty".