20626224746777 has 4 divisors (see below), whose sum is σ = 22212857419620. Its totient is φ = 19039592073936.

The previous prime is 20626224746761. The next prime is 20626224746791. The reversal of 20626224746777 is 77764742262602.

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

It can be written as a sum of positive squares in 2 ways, for example, as 2663851601161 + 17962373145616 = 1632131^2 + 4238204^2 .

It is a cyclic number.

It is not a de Polignac number, because 20626224746777 - 2⁴ = 20626224746761 is a prime.

It is a super-2 number, since 2×20626224746777² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20626224746707) 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, 793316336402 + ... + 793316336427.

It is an arithmetic number, because the mean of its divisors is an integer number (5553214354905).

Almost surely, 2^{20626224746777} is an apocalyptic number.

It is an amenable number.

20626224746777 is a deficient number, since it is larger than the sum of its proper divisors (1586632672843).

20626224746777 is a wasteful number, since it uses less digits than its factorization.

20626224746777 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1586632672842.

The product of its (nonzero) digits is 132765696, while the sum is 62.

The spelling of 20626224746777 in words is "twenty trillion, six hundred twenty-six billion, two hundred twenty-four million, seven hundred forty-six thousand, seven hundred seventy-seven".