20909036613 has 8 divisors (see below), whose sum is σ = 27893560000. Its totient is φ = 13931935488.

The previous prime is 20909036579. The next prime is 20909036641. The reversal of 20909036613 is 31663090902.

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

It is not a de Polignac number, because 20909036613 - 2¹⁷ = 20908905541 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20909036713) 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, 1848988 + ... + 1860261.

It is an arithmetic number, because the mean of its divisors is an integer number (3486695000).

Almost surely, 2^20909036613 is an apocalyptic number.

It is an amenable number.

20909036613 is a deficient number, since it is larger than the sum of its proper divisors (6984523387).

20909036613 is a wasteful number, since it uses less digits than its factorization.

20909036613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3711131.

The product of its (nonzero) digits is 52488, while the sum is 39.

The spelling of 20909036613 in words is "twenty billion, nine hundred nine million, thirty-six thousand, six hundred thirteen".