20045442003 has 8 divisors (see below), whose sum is σ = 26751848448. Its totient is φ = 13351331784.

The previous prime is 20045441987. The next prime is 20045442019. The reversal of 20045442003 is 30024454002.

It is an interprime number because it is at equal distance from previous prime (20045441987) and next prime (20045442019).

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

It is not a de Polignac number, because 20045442003 - 2⁴ = 20045441987 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20045442083) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3070251 + ... + 3076772.

It is an arithmetic number, because the mean of its divisors is an integer number (3343981056).

Almost surely, 2^20045442003 is an apocalyptic number.

20045442003 is a deficient number, since it is larger than the sum of its proper divisors (6706406445).

20045442003 is a wasteful number, since it uses less digits than its factorization.

20045442003 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6148113.

The product of its (nonzero) digits is 3840, while the sum is 24.

Adding to 20045442003 its reverse (30024454002), we get a palindrome (50069896005).

The spelling of 20045442003 in words is "twenty billion, forty-five million, four hundred forty-two thousand, three".