20449737459 has 96 divisors (see below), whose sum is σ = 32036808960. Its totient is φ = 12548929536.

The previous prime is 20449737439. The next prime is 20449737479. The reversal of 20449737459 is 95473794402.

It is an interprime number because it is at equal distance from previous prime (20449737439) and next prime (20449737479).

It is not a de Polignac number, because 20449737459 - 2²⁵ = 20416183027 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20449737439) 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 95 ways as a sum of consecutive naturals, for example, 73825629 + ... + 73825905.

It is an arithmetic number, because the mean of its divisors is an integer number (333716760).

Almost surely, 2^20449737459 is an apocalyptic number.

20449737459 is a deficient number, since it is larger than the sum of its proper divisors (11587071501).

20449737459 is a wasteful number, since it uses less digits than its factorization.

20449737459 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 509 (or 506 counting only the distinct ones).

The product of its (nonzero) digits is 7620480, while the sum is 54.

The spelling of 20449737459 in words is "twenty billion, four hundred forty-nine million, seven hundred thirty-seven thousand, four hundred fifty-nine".