20717744962 has 4 divisors (see below), whose sum is σ = 31076617446. Its totient is φ = 10358872480.

The previous prime is 20717744947. The next prime is 20717744969. The reversal of 20717744962 is 26944771702.

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

It can be written as a sum of positive squares in only one way, i.e., 20471600241 + 246144721 = 143079^2 + 15689^2 .

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 (20717744969) 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 as a sum of consecutive naturals, namely, 5179436239 + ... + 5179436242.

Almost surely, 2^20717744962 is an apocalyptic number.

20717744962 is a deficient number, since it is larger than the sum of its proper divisors (10358872484).

20717744962 is a wasteful number, since it uses less digits than its factorization.

20717744962 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10358872483.

The product of its (nonzero) digits is 1185408, while the sum is 49.

The spelling of 20717744962 in words is "twenty billion, seven hundred seventeen million, seven hundred forty-four thousand, nine hundred sixty-two".