20445425056243 has 16 divisors (see below), whose sum is σ = 22500603413856. Its totient is φ = 18423692605440.

The previous prime is 20445425056241. The next prime is 20445425056253. The reversal of 20445425056243 is 34265052454402.

It is a cyclic number.

It is not a de Polignac number, because 20445425056243 - 2¹ = 20445425056241 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20445425056193 and 20445425056202.

It is not an unprimeable number, because it can be changed into a prime (20445425056241) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16795396 + ... + 17971537.

It is an arithmetic number, because the mean of its divisors is an integer number (1406287713366).

Almost surely, 2^{20445425056243} is an apocalyptic number.

20445425056243 is a deficient number, since it is larger than the sum of its proper divisors (2055178357613).

20445425056243 is a wasteful number, since it uses less digits than its factorization.

20445425056243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34767414.

The product of its (nonzero) digits is 4608000, while the sum is 46.

The spelling of 20445425056243 in words is "twenty trillion, four hundred forty-five billion, four hundred twenty-five million, fifty-six thousand, two hundred forty-three".