20008605739 has 8 divisors (see below), whose sum is σ = 20392190640. Its totient is φ = 19625245536.

The previous prime is 20008605733. The next prime is 20008605761. The reversal of 20008605739 is 93750680002.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20008605739 - 2³ = 20008605731 is a prime.

It is a super-2 number, since 2×20008605739² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20008605731) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 129444 + ... + 238270.

It is an arithmetic number, because the mean of its divisors is an integer number (2549023830).

Almost surely, 2^20008605739 is an apocalyptic number.

20008605739 is a deficient number, since it is larger than the sum of its proper divisors (383584901).

20008605739 is a wasteful number, since it uses less digits than its factorization.

20008605739 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112349.

The product of its (nonzero) digits is 90720, while the sum is 40.

The spelling of 20008605739 in words is "twenty billion, eight million, six hundred five thousand, seven hundred thirty-nine".