20012079309 has 8 divisors (see below), whose sum is σ = 26737118112. Its totient is φ = 13314213360.

The previous prime is 20012079301. The next prime is 20012079319. The reversal of 20012079309 is 90397021002.

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

It is not a de Polignac number, because 20012079309 - 2³ = 20012079301 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20012079309.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20012079301) 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, 6791494 + ... + 6794439.

It is an arithmetic number, because the mean of its divisors is an integer number (3342139764).

Almost surely, 2^20012079309 is an apocalyptic number.

It is an amenable number.

20012079309 is a deficient number, since it is larger than the sum of its proper divisors (6725038803).

20012079309 is a wasteful number, since it uses less digits than its factorization.

20012079309 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13586427.

The product of its (nonzero) digits is 6804, while the sum is 33.

The spelling of 20012079309 in words is "twenty billion, twelve million, seventy-nine thousand, three hundred nine".