20577636148 has 6 divisors (see below), whose sum is σ = 36010863266. Its totient is φ = 10288818072.

The previous prime is 20577636143. The next prime is 20577636161. The reversal of 20577636148 is 84163677502.

It can be written as a sum of positive squares in only one way, i.e., 17717739664 + 2859896484 = 133108^2 + 53478^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20577636143) by changing a digit.

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, 2572204515 + ... + 2572204522.

Almost surely, 2^20577636148 is an apocalyptic number.

It is an amenable number.

20577636148 is a deficient number, since it is larger than the sum of its proper divisors (15433227118).

20577636148 is a wasteful number, since it uses less digits than its factorization.

20577636148 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5144409041 (or 5144409039 counting only the distinct ones).

The product of its (nonzero) digits is 1693440, while the sum is 49.

The spelling of 20577636148 in words is "twenty billion, five hundred seventy-seven million, six hundred thirty-six thousand, one hundred forty-eight".