20544963137236 has 12 divisors (see below), whose sum is σ = 35953947071028. Its totient is φ = 10272406831232.

The previous prime is 20544963137233. The next prime is 20544963137291. The reversal of 20544963137236 is 63273136944502.

It can be written as a sum of positive squares in 2 ways, for example, as 1829337400900 + 18715625736336 = 1352530^2 + 4326156^2 .

It is a super-2 number, since 2×20544963137236² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20544963137233) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18063541 + ... + 19167196.

It is an arithmetic number, because the mean of its divisors is an integer number (2996162255919).

Almost surely, 2^{20544963137236} is an apocalyptic number.

It is an amenable number.

20544963137236 is a deficient number, since it is larger than the sum of its proper divisors (15408983933792).

20544963137236 is a wasteful number, since it uses less digits than its factorization.

20544963137236 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37368698 (or 37368696 counting only the distinct ones).

The product of its (nonzero) digits is 19595520, while the sum is 55.

The spelling of 20544963137236 in words is "twenty trillion, five hundred forty-four billion, nine hundred sixty-three million, one hundred thirty-seven thousand, two hundred thirty-six".