20553620123546 has 8 divisors (see below), whose sum is σ = 30950392949460. Its totient is φ = 10236822473728.

The previous prime is 20553620123527. The next prime is 20553620123551. The reversal of 20553620123546 is 64532102635502.

It can be written as a sum of positive squares in 2 ways, for example, as 16745896230625 + 3807723892921 = 4092175^2 + 1951339^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×20553620123546² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20553620123497 and 20553620123506.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19993793381 + ... + 19993794408.

Almost surely, 2^{20553620123546} is an apocalyptic number.

20553620123546 is a deficient number, since it is larger than the sum of its proper divisors (10396772825914).

20553620123546 is a wasteful number, since it uses less digits than its factorization.

20553620123546 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39987588048.

The product of its (nonzero) digits is 1296000, while the sum is 44.

The spelling of 20553620123546 in words is "twenty trillion, five hundred fifty-three billion, six hundred twenty million, one hundred twenty-three thousand, five hundred forty-six".