20786319307 has 4 divisors (see below), whose sum is σ = 22385266960. Its totient is φ = 19187371656.

The previous prime is 20786319269. The next prime is 20786319317. The reversal of 20786319307 is 70391368702.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20786319307 - 2⁷ = 20786319179 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20786319317) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 799473807 + ... + 799473832.

It is an arithmetic number, because the mean of its divisors is an integer number (5596316740).

Almost surely, 2^20786319307 is an apocalyptic number.

20786319307 is a deficient number, since it is larger than the sum of its proper divisors (1598947653).

20786319307 is a wasteful number, since it uses less digits than its factorization.

20786319307 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1598947652.

The product of its (nonzero) digits is 381024, while the sum is 46.

The spelling of 20786319307 in words is "twenty billion, seven hundred eighty-six million, three hundred nineteen thousand, three hundred seven".