20842044628 has 12 divisors (see below), whose sum is σ = 36475883892. Its totient is φ = 10420363520.

The previous prime is 20842044617. The next prime is 20842044637. The reversal of 20842044628 is 82644024802.

It can be written as a sum of positive squares in 2 ways, for example, as 17276999364 + 3565045264 = 131442^2 + 59708^2 .

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, 89725 + ... + 223012.

It is an arithmetic number, because the mean of its divisors is an integer number (3039656991).

Almost surely, 2^20842044628 is an apocalyptic number.

It is an amenable number.

20842044628 is a deficient number, since it is larger than the sum of its proper divisors (15633839264).

20842044628 is a wasteful number, since it uses less digits than its factorization.

20842044628 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 329402 (or 329400 counting only the distinct ones).

The product of its (nonzero) digits is 196608, while the sum is 40.

The spelling of 20842044628 in words is "twenty billion, eight hundred forty-two million, forty-four thousand, six hundred twenty-eight".