20908693363 has 4 divisors (see below), whose sum is σ = 22138616520. Its totient is φ = 19678770208.

The previous prime is 20908693339. The next prime is 20908693367. The reversal of 20908693363 is 36339680902.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 20908693363 - 2⁹ = 20908692851 is a prime.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (20908693367) 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, 614961553 + ... + 614961586.

It is an arithmetic number, because the mean of its divisors is an integer number (5534654130).

Almost surely, 2^20908693363 is an apocalyptic number.

20908693363 is a deficient number, since it is larger than the sum of its proper divisors (1229923157).

20908693363 is a wasteful number, since it uses less digits than its factorization.

20908693363 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1229923156.

The product of its (nonzero) digits is 1259712, while the sum is 49.

The spelling of 20908693363 in words is "twenty billion, nine hundred eight million, six hundred ninety-three thousand, three hundred sixty-three".