20750777504 has 12 divisors (see below), whose sum is σ = 40853093274. Its totient is φ = 10375388736.

The previous prime is 20750777501. The next prime is 20750777527. The reversal of 20750777504 is 40577705702.

It can be written as a sum of positive squares in only one way, i.e., 17888527504 + 2862250000 = 133748^2 + 53500^2 .

It is not an unprimeable number, because it can be changed into a prime (20750777501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 324230867 + ... + 324230930.

Almost surely, 2^20750777504 is an apocalyptic number.

It is an amenable number.

20750777504 is a deficient number, since it is larger than the sum of its proper divisors (20102315770).

20750777504 is an equidigital number, since it uses as much as digits as its factorization.

20750777504 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 648461807 (or 648461799 counting only the distinct ones).

The product of its (nonzero) digits is 480200, while the sum is 44.

The spelling of 20750777504 in words is "twenty billion, seven hundred fifty million, seven hundred seventy-seven thousand, five hundred four".