20445504405 has 32 divisors (see below), whose sum is σ = 32953599360. Its totient is φ = 10824222720.

The previous prime is 20445504361. The next prime is 20445504433. The reversal of 20445504405 is 50440554402.

It is not a de Polignac number, because 20445504405 - 2¹⁰ = 20445503381 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1585785 + ... + 1598625.

It is an arithmetic number, because the mean of its divisors is an integer number (1029799980).

Almost surely, 2^20445504405 is an apocalyptic number.

It is an amenable number.

20445504405 is a deficient number, since it is larger than the sum of its proper divisors (12508094955).

20445504405 is a wasteful number, since it uses less digits than its factorization.

20445504405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13621.

The product of its (nonzero) digits is 64000, while the sum is 33.

The spelling of 20445504405 in words is "twenty billion, four hundred forty-five million, five hundred four thousand, four hundred five".