20440240622464 has 32 divisors (see below), whose sum is σ = 43853160473640. Its totient is φ = 9433957209600.

The previous prime is 20440240622453. The next prime is 20440240622479. The reversal of 20440240622464 is 46422604204402.

It is a tau number, because it is divible by the number of its divisors (32).

It is a congruent number.

It is an unprimeable number.

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, 6141897562 + ... + 6141900889.

Almost surely, 2^{20440240622464} is an apocalyptic number.

It is an amenable number.

20440240622464 is an abundant number, since it is smaller than the sum of its proper divisors (23412919851176).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20440240622464 is a wasteful number, since it uses less digits than its factorization.

20440240622464 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12283798478 (or 12283798466 counting only the distinct ones).

The product of its (nonzero) digits is 589824, while the sum is 40.

Adding to 20440240622464 its reverse (46422604204402), we get a palindrome (66862844826866).

The spelling of 20440240622464 in words is "twenty trillion, four hundred forty billion, two hundred forty million, six hundred twenty-two thousand, four hundred sixty-four".