1020440024020 has 12 divisors (see below), whose sum is σ = 2142924050484. Its totient is φ = 408176009600.

The previous prime is 1020440023987. The next prime is 1020440024029. The reversal of 1020440024020 is 204200440201.

It can be written as a sum of positive squares in 2 ways, for example, as 178325465796 + 842114558224 = 422286^2 + 917668^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1020440024029) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25511000581 + ... + 25511000620.

It is an arithmetic number, because the mean of its divisors is an integer number (178577004207).

Almost surely, 2^{1020440024020} is an apocalyptic number.

1020440024020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1020440024020 is an abundant number, since it is smaller than the sum of its proper divisors (1122484026464).

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

1020440024020 is a wasteful number, since it uses less digits than its factorization.

1020440024020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51022001210 (or 51022001208 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 19.

Adding to 1020440024020 its reverse (204200440201), we get a palindrome (1224640464221).

The spelling of 1020440024020 in words is "one trillion, twenty billion, four hundred forty million, twenty-four thousand, twenty".