20005045453 has 8 divisors (see below), whose sum is σ = 20456523360. Its totient is φ = 19557314640.

The previous prime is 20005045391. The next prime is 20005045481. The reversal of 20005045453 is 35454050002.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20005045453 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20005045153) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 925975 + ... + 947332.

It is an arithmetic number, because the mean of its divisors is an integer number (2557065420).

Almost surely, 2^20005045453 is an apocalyptic number.

It is an amenable number.

20005045453 is a deficient number, since it is larger than the sum of its proper divisors (451477907).

20005045453 is a wasteful number, since it uses less digits than its factorization.

20005045453 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1873547.

The product of its (nonzero) digits is 12000, while the sum is 28.

Adding to 20005045453 its reverse (35454050002), we get a palindrome (55459095455).

The spelling of 20005045453 in words is "twenty billion, five million, forty-five thousand, four hundred fifty-three".