20005111464677 has 12 divisors (see below), whose sum is σ = 20204463558636. Its totient is φ = 19806670618560.

The previous prime is 20005111464673. The next prime is 20005111464697. The reversal of 20005111464677 is 77646411150002.

It can be written as a sum of positive squares in 2 ways, for example, as 14728355764516 + 5276755700161 = 3837754^2 + 2297119^2 .

It is not a de Polignac number, because 20005111464677 - 2² = 20005111464673 is a prime.

It is a super-2 number, since 2×20005111464677² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20005111464671) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 19170527 + ... + 20187107.

It is an arithmetic number, because the mean of its divisors is an integer number (1683705296553).

Almost surely, 2^{20005111464677} is an apocalyptic number.

It is an amenable number.

20005111464677 is a deficient number, since it is larger than the sum of its proper divisors (199352093959).

20005111464677 is an equidigital number, since it uses as much as digits as its factorization.

20005111464677 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1017476 (or 1017097 counting only the distinct ones).

The product of its (nonzero) digits is 282240, while the sum is 44.

The spelling of 20005111464677 in words is "twenty trillion, five billion, one hundred eleven million, four hundred sixty-four thousand, six hundred seventy-seven".