20000077777777 has 4 divisors (see below), whose sum is σ = 20003108558400. Its totient is φ = 19997046997156.

The previous prime is 20000077777751. The next prime is 20000077777787. The reversal of 20000077777777 is 77777777000002.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 20000077777777 - 2¹¹ = 20000077775729 is a prime.

It is a super-2 number, since 2×20000077777777² (a number of 27 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (58) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20000077777787) 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, 1515380413 + ... + 1515393610.

It is an arithmetic number, because the mean of its divisors is an integer number (5000777139600).

Almost surely, 2^{20000077777777} is an apocalyptic number.

It is an amenable number.

20000077777777 is a deficient number, since it is larger than the sum of its proper divisors (3030780623).

20000077777777 is an equidigital number, since it uses as much as digits as its factorization.

20000077777777 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3030780622.

The product of its (nonzero) digits is 11529602, while the sum is 58.

The spelling of 20000077777777 in words is "twenty trillion, seventy-seven million, seven hundred seventy-seven thousand, seven hundred seventy-seven".