21063136274 has 8 divisors (see below), whose sum is σ = 31685234700. Its totient is φ = 10501391376.

The previous prime is 21063136273. The next prime is 21063136277. The reversal of 21063136274 is 47263136012.

It can be written as a sum of positive squares in 2 ways, for example, as 16152630649 + 4910505625 = 127093^2 + 70075^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (21063136273) 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 3 ways as a sum of consecutive naturals, for example, 15087509 + ... + 15088904.

Almost surely, 2^21063136274 is an apocalyptic number.

21063136274 is a deficient number, since it is larger than the sum of its proper divisors (10622098426).

21063136274 is a wasteful number, since it uses less digits than its factorization.

21063136274 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30176764.

The product of its (nonzero) digits is 36288, while the sum is 35.

The spelling of 21063136274 in words is "twenty-one billion, sixty-three million, one hundred thirty-six thousand, two hundred seventy-four".