20510660663422 has 4 divisors (see below), whose sum is σ = 30765990995136. Its totient is φ = 10255330331710.

The previous prime is 20510660663417. The next prime is 20510660663431. The reversal of 20510660663422 is 22436606601502.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5127665165854 + ... + 5127665165857.

It is an arithmetic number, because the mean of its divisors is an integer number (7691497748784).

Almost surely, 2^{20510660663422} is an apocalyptic number.

20510660663422 is a deficient number, since it is larger than the sum of its proper divisors (10255330331714).

20510660663422 is a wasteful number, since it uses less digits than its factorization.

20510660663422 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10255330331713.

The product of its (nonzero) digits is 622080, while the sum is 43.

The spelling of 20510660663422 in words is "twenty trillion, five hundred ten billion, six hundred sixty million, six hundred sixty-three thousand, four hundred twenty-two".