20455005306651 has 4 divisors (see below), whose sum is σ = 27273340408872. Its totient is φ = 13636670204432.

The previous prime is 20455005306643. The next prime is 20455005306683. The reversal of 20455005306651 is 15660350055402.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20455005306651 - 2³ = 20455005306643 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20455005304651) 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, 3409167551106 + ... + 3409167551111.

It is an arithmetic number, because the mean of its divisors is an integer number (6818335102218).

Almost surely, 2^{20455005306651} is an apocalyptic number.

20455005306651 is a deficient number, since it is larger than the sum of its proper divisors (6818335102221).

20455005306651 is an equidigital number, since it uses as much as digits as its factorization.

20455005306651 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6818335102220.

The product of its (nonzero) digits is 540000, while the sum is 42.

The spelling of 20455005306651 in words is "twenty trillion, four hundred fifty-five billion, five million, three hundred six thousand, six hundred fifty-one".