20135221663347 has 24 divisors (see below), whose sum is σ = 33315860780384. Its totient is φ = 11479268553984.

The previous prime is 20135221663331. The next prime is 20135221663411. The reversal of 20135221663347 is 74336612253102.

It is a happy number.

20135221663347 is a `hidden beast` number, since 2 + 0 + 1 + 3 + 5 + 2 + 2 + 1 + 6 + 633 + 4 + 7 = 666.

It is not a de Polignac number, because 20135221663347 - 2⁴ = 20135221663331 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20135221663307) 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 23 ways as a sum of consecutive naturals, for example, 369033568 + ... + 369088125.

Almost surely, 2^{20135221663347} is an apocalyptic number.

20135221663347 is a deficient number, since it is larger than the sum of its proper divisors (13180639117037).

20135221663347 is a wasteful number, since it uses less digits than its factorization.

20135221663347 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 738122139 (or 738122136 counting only the distinct ones).

The product of its (nonzero) digits is 1088640, while the sum is 45.

The spelling of 20135221663347 in words is "twenty trillion, one hundred thirty-five billion, two hundred twenty-one million, six hundred sixty-three thousand, three hundred forty-seven".