20455547665636 has 24 divisors (see below), whose sum is σ = 35890303129856. Its totient is φ = 10201207413600.

The previous prime is 20455547665591. The next prime is 20455547665667. The reversal of 20455547665636 is 63656674555402.

It is a happy number.

It is a super-2 number, since 2×20455547665636² (a number of 27 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1456191 + ... + 6559846.

Almost surely, 2^{20455547665636} is an apocalyptic number.

It is an amenable number.

20455547665636 is a deficient number, since it is larger than the sum of its proper divisors (15434755464220).

20455547665636 is a wasteful number, since it uses less digits than its factorization.

20455547665636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8017699 (or 8017697 counting only the distinct ones).

The product of its (nonzero) digits is 544320000, while the sum is 64.

The spelling of 20455547665636 in words is "twenty trillion, four hundred fifty-five billion, five hundred forty-seven million, six hundred sixty-five thousand, six hundred thirty-six".