20040405445 has 8 divisors (see below), whose sum is σ = 24169334400. Its totient is φ = 15951759120.

The previous prime is 20040405397. The next prime is 20040405509. The reversal of 20040405445 is 54450404002.

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

It is a de Polignac number, because none of the positive numbers 2^k-20040405445 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10069561 + ... + 10071550.

It is an arithmetic number, because the mean of its divisors is an integer number (3021166800).

Almost surely, 2^20040405445 is an apocalyptic number.

It is an amenable number.

20040405445 is a deficient number, since it is larger than the sum of its proper divisors (4128928955).

20040405445 is a wasteful number, since it uses less digits than its factorization.

20040405445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20141315.

The product of its (nonzero) digits is 12800, while the sum is 28.

Adding to 20040405445 its reverse (54450404002), we get a palindrome (74490809447).

The spelling of 20040405445 in words is "twenty billion, forty million, four hundred five thousand, four hundred forty-five".