20045442004 has 12 divisors (see below), whose sum is σ = 40090884064. Its totient is φ = 8590903704.

The previous prime is 20045441987. The next prime is 20045442019. The reversal of 20045442004 is 40024454002.

It is a happy number.

20045442004 is an admirable number.

It is a self number, because there is not a number n which added to its sum of digits gives 20045442004.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 357954294 + ... + 357954349.

Almost surely, 2^20045442004 is an apocalyptic number.

It is an amenable number.

20045442004 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20045442004 is a wasteful number, since it uses less digits than its factorization.

20045442004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 715908654 (or 715908652 counting only the distinct ones).

The product of its (nonzero) digits is 5120, while the sum is 25.

Adding to 20045442004 its reverse (40024454002), we get a palindrome (60069896006).

The spelling of 20045442004 in words is "twenty billion, forty-five million, four hundred forty-two thousand, four".