20440365499 has 16 divisors (see below), whose sum is σ = 21462912000. Its totient is φ = 19441044000.

The previous prime is 20440365493. The next prime is 20440365503. The reversal of 20440365499 is 99456304402.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20440365499 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20440365493) 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 15 ways as a sum of consecutive naturals, for example, 2831004 + ... + 2838214.

It is an arithmetic number, because the mean of its divisors is an integer number (1341432000).

Almost surely, 2^20440365499 is an apocalyptic number.

20440365499 is a deficient number, since it is larger than the sum of its proper divisors (1022546501).

20440365499 is a wasteful number, since it uses less digits than its factorization.

20440365499 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8802.

The product of its (nonzero) digits is 933120, while the sum is 46.

The spelling of 20440365499 in words is "twenty billion, four hundred forty million, three hundred sixty-five thousand, four hundred ninety-nine".