1011004440020 has 24 divisors (see below), whose sum is σ = 2123168263944. Its totient is φ = 404390549376.

The previous prime is 1011004440013. The next prime is 1011004440023. The reversal of 1011004440020 is 200444001101.

It can be written as a sum of positive squares in 4 ways, for example, as 340462914064 + 670541525956 = 583492^2 + 818866^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1011004440023) 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, 56774 + ... + 1423106.

It is an arithmetic number, because the mean of its divisors is an integer number (88465344331).

Almost surely, 2^{1011004440020} is an apocalyptic number.

1011004440020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1011004440020 is an abundant number, since it is smaller than the sum of its proper divisors (1112163823924).

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

1011004440020 is a wasteful number, since it uses less digits than its factorization.

1011004440020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1403339 (or 1403337 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 1011004440020 its reverse (200444001101), we get a palindrome (1211448441121).

The spelling of 1011004440020 in words is "one trillion, eleven billion, four million, four hundred forty thousand, twenty".