20617957463 has 4 divisors (see below), whose sum is σ = 20629497000. Its totient is φ = 20606417928.

The previous prime is 20617957453. The next prime is 20617957471. The reversal of 20617957463 is 36475971602.

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 20617957463 - 2¹⁴ = 20617941079 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20617957453) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5767088 + ... + 5770661.

It is an arithmetic number, because the mean of its divisors is an integer number (5157374250).

Almost surely, 2^20617957463 is an apocalyptic number.

20617957463 is a deficient number, since it is larger than the sum of its proper divisors (11539537).

20617957463 is a wasteful number, since it uses less digits than its factorization.

20617957463 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11539536.

The product of its (nonzero) digits is 1905120, while the sum is 50.

The spelling of 20617957463 in words is "twenty billion, six hundred seventeen million, nine hundred fifty-seven thousand, four hundred sixty-three".