20277550544 has 10 divisors (see below), whose sum is σ = 39287754210. Its totient is φ = 10138775264.

The previous prime is 20277550537. The next prime is 20277550571. The reversal of 20277550544 is 44505577202.

It can be written as a sum of positive squares in only one way, i.e., 11811342400 + 8466208144 = 108680^2 + 92012^2 .

It is a super-2 number, since 2×20277550544² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 633673439 + ... + 633673470.

It is an arithmetic number, because the mean of its divisors is an integer number (3928775421).

Almost surely, 2^20277550544 is an apocalyptic number.

It is an amenable number.

20277550544 is a deficient number, since it is larger than the sum of its proper divisors (19010203666).

20277550544 is a wasteful number, since it uses less digits than its factorization.

20277550544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1267346917 (or 1267346911 counting only the distinct ones).

The product of its (nonzero) digits is 392000, while the sum is 41.

The spelling of 20277550544 in words is "twenty billion, two hundred seventy-seven million, five hundred fifty thousand, five hundred forty-four".