20607777019 has 4 divisors (see below), whose sum is σ = 20608091280. Its totient is φ = 20607462760.

The previous prime is 20607777011. The next prime is 20607777053. The reversal of 20607777019 is 91077770602.

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 20607777019 - 2³ = 20607777011 is a prime.

It is a super-2 number, since 2×20607777019² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20607777019.

It is not an unprimeable number, because it can be changed into a prime (20607777011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17272 + ... + 203749.

It is an arithmetic number, because the mean of its divisors is an integer number (5152022820).

Almost surely, 2^20607777019 is an apocalyptic number.

20607777019 is a deficient number, since it is larger than the sum of its proper divisors (314261).

20607777019 is an equidigital number, since it uses as much as digits as its factorization.

20607777019 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 314260.

The product of its (nonzero) digits is 259308, while the sum is 46.

The spelling of 20607777019 in words is "twenty billion, six hundred seven million, seven hundred seventy-seven thousand, nineteen".