20455640624545 has 8 divisors (see below), whose sum is σ = 28053449999424. Its totient is φ = 14026724999664.

The previous prime is 20455640624527. The next prime is 20455640624557. The reversal of 20455640624545 is 54542604655402.

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

It is a cyclic number.

It is not a de Polignac number, because 20455640624545 - 2⁵ = 20455640624513 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20455640624492 and 20455640624501.

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, 292223437459 + ... + 292223437528.

It is an arithmetic number, because the mean of its divisors is an integer number (3506681249928).

Almost surely, 2^{20455640624545} is an apocalyptic number.

It is an amenable number.

20455640624545 is a deficient number, since it is larger than the sum of its proper divisors (7597809374879).

20455640624545 is an equidigital number, since it uses as much as digits as its factorization.

20455640624545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 584446874999.

The product of its (nonzero) digits is 23040000, while the sum is 52.

The spelling of 20455640624545 in words is "twenty trillion, four hundred fifty-five billion, six hundred forty million, six hundred twenty-four thousand, five hundred forty-five".