20776123685770 has 96 divisors (see below), whose sum is σ = 39390378608880. Its totient is φ = 7887451514880.

The previous prime is 20776123685749. The next prime is 20776123685777. The reversal of 20776123685770 is 7758632167702.

It can be written as a sum of positive squares in 24 ways, for example, as 6571116969561 + 14205006716209 = 2563419^2 + 3768953^2 .

It is a Harshad number since it is a multiple of its sum of digits (61).

It is a junction number, because it is equal to n+sod(n) for n = 20776123685699 and 20776123685708.

It is not an unprimeable number, because it can be changed into a prime (20776123685777) by changing a digit.

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 47 ways as a sum of consecutive naturals, for example, 889034646 + ... + 889058014.

Almost surely, 2^{20776123685770} is an apocalyptic number.

20776123685770 is a deficient number, since it is larger than the sum of its proper divisors (18614254923110).

20776123685770 is a wasteful number, since it uses less digits than its factorization.

20776123685770 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25228 (or 25199 counting only the distinct ones).

The product of its (nonzero) digits is 41489280, while the sum is 61.

The spelling of 20776123685770 in words is "twenty trillion, seven hundred seventy-six billion, one hundred twenty-three million, six hundred eighty-five thousand, seven hundred seventy".