20445445654 has 32 divisors (see below), whose sum is σ = 31861226880. Its totient is φ = 9833513472.

The previous prime is 20445445651. The next prime is 20445445661. The reversal of 20445445654 is 45654454402.

It is a self number, because there is not a number n which added to its sum of digits gives 20445445654.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20445445651) 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, 2005482 + ... + 2015650.

It is an arithmetic number, because the mean of its divisors is an integer number (995663340).

Almost surely, 2^20445445654 is an apocalyptic number.

20445445654 is a deficient number, since it is larger than the sum of its proper divisors (11415781226).

20445445654 is a wasteful number, since it uses less digits than its factorization.

20445445654 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10584.

The product of its (nonzero) digits is 1536000, while the sum is 43.

The spelling of 20445445654 in words is "twenty billion, four hundred forty-five million, four hundred forty-five thousand, six hundred fifty-four".