20306902777 has 8 divisors (see below), whose sum is σ = 23645774016. Its totient is φ = 17077502832.

The previous prime is 20306902771. The next prime is 20306902801. The reversal of 20306902777 is 77720960302.

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 20306902777 - 2³ = 20306902769 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20306902771) 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, 27367423 + ... + 27368164.

It is an arithmetic number, because the mean of its divisors is an integer number (2955721752).

Almost surely, 2^20306902777 is an apocalyptic number.

It is an amenable number.

20306902777 is a deficient number, since it is larger than the sum of its proper divisors (3338871239).

20306902777 is an equidigital number, since it uses as much as digits as its factorization.

20306902777 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54735647.

The product of its (nonzero) digits is 222264, while the sum is 43.

The spelling of 20306902777 in words is "twenty billion, three hundred six million, nine hundred two thousand, seven hundred seventy-seven".