20009671879 has 8 divisors (see below), whose sum is σ = 20351031120. Its totient is φ = 19668386496.

The previous prime is 20009671861. The next prime is 20009671889. The reversal of 20009671879 is 97817690002.

It is a happy number.

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 20009671879 - 2¹¹ = 20009669831 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 (20009671819) 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, 1028587 + ... + 1047859.

It is an arithmetic number, because the mean of its divisors is an integer number (2543878890).

Almost surely, 2^20009671879 is an apocalyptic number.

20009671879 is a deficient number, since it is larger than the sum of its proper divisors (341359241).

20009671879 is a wasteful number, since it uses less digits than its factorization.

20009671879 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36929.

The product of its (nonzero) digits is 381024, while the sum is 49.

The spelling of 20009671879 in words is "twenty billion, nine million, six hundred seventy-one thousand, eight hundred seventy-nine".