21827574050 has 12 divisors (see below), whose sum is σ = 40599287826. Its totient is φ = 8731029600.

The previous prime is 21827574037. The next prime is 21827574059. The reversal of 21827574050 is 5047572812.

It can be written as a sum of positive squares in 3 ways, for example, as 16662420889 + 5165153161 = 129083^2 + 71869^2 .

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 21827573989 and 21827574007.

It is not an unprimeable number, because it can be changed into a prime (21827574059) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 218275691 + ... + 218275790.

Almost surely, 2^21827574050 is an apocalyptic number.

21827574050 is a deficient number, since it is larger than the sum of its proper divisors (18771713776).

21827574050 is a wasteful number, since it uses less digits than its factorization.

21827574050 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 436551493 (or 436551488 counting only the distinct ones).

The product of its (nonzero) digits is 156800, while the sum is 41.

The spelling of 21827574050 in words is "twenty-one billion, eight hundred twenty-seven million, five hundred seventy-four thousand, fifty".