20775577557702 has 16 divisors (see below), whose sum is σ = 45328532853312. Its totient is φ = 6295629562920.

The previous prime is 20775577557689. The next prime is 20775577557743.

20775577557702 is nontrivially palindromic in base 10.

It is a Harshad number since it is a multiple of its sum of digits (66), and also a Moran number because the ratio is a prime number: 314781478147 = 20775577557702 / (2 + 0 + 7 + 7 + 5 + 5 + 7 + 7 + 5 + 5 + 7 + 7 + 0 + 2).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 157390739008 + ... + 157390739139.

It is an arithmetic number, because the mean of its divisors is an integer number (2833033303332).

Almost surely, 2^{20775577557702} is an apocalyptic number.

20775577557702 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

20775577557702 is an abundant number, since it is smaller than the sum of its proper divisors (24552955295610).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20775577557702 is a wasteful number, since it uses less digits than its factorization.

20775577557702 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 314781478163.

The product of its (nonzero) digits is 294122500, while the sum is 66.

The spelling of 20775577557702 in words is "twenty trillion, seven hundred seventy-five billion, five hundred seventy-seven million, five hundred fifty-seven thousand, seven hundred two".