20783952677 has 8 divisors (see below), whose sum is σ = 20868939000. Its totient is φ = 20699112384.

The previous prime is 20783952671. The next prime is 20783952689. The reversal of 20783952677 is 77625938702.

It can be written as a sum of positive squares in 4 ways, for example, as 6372190276 + 14411762401 = 79826^2 + 120049^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20783952677 - 2⁴ = 20783952661 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20783952671) 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 7 ways as a sum of consecutive naturals, for example, 253403 + ... + 325239.

It is an arithmetic number, because the mean of its divisors is an integer number (2608617375).

Almost surely, 2^20783952677 is an apocalyptic number.

It is an amenable number.

20783952677 is a deficient number, since it is larger than the sum of its proper divisors (84986323).

20783952677 is an equidigital number, since it uses as much as digits as its factorization.

20783952677 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73015.

The product of its (nonzero) digits is 8890560, while the sum is 56.

The spelling of 20783952677 in words is "twenty billion, seven hundred eighty-three million, nine hundred fifty-two thousand, six hundred seventy-seven".