1020440011 has 16 divisors (see below), whose sum is σ = 1186790400. Its totient is φ = 870300288.

The previous prime is 1020439997. The next prime is 1020440017. The reversal of 1020440011 is 1100440201.

It is a cyclic number.

It is not a de Polignac number, because 1020440011 - 2⁷ = 1020439883 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1020439973 and 1020440000.

It is not an unprimeable number, because it can be changed into a prime (1020440017) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 61251 + ... + 76108.

It is an arithmetic number, because the mean of its divisors is an integer number (74174400).

Almost surely, 2^1020440011 is an apocalyptic number.

1020440011 is a deficient number, since it is larger than the sum of its proper divisors (166350389).

1020440011 is a wasteful number, since it uses less digits than its factorization.

1020440011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 137418.

The product of its (nonzero) digits is 32, while the sum is 13.

The square root of 1020440011 is about 31944.3267420054. The cubic root of 1020440011 is about 1006.7674355046.

Adding to 1020440011 its reverse (1100440201), we get a palindrome (2120880212).

The spelling of 1020440011 in words is "one billion, twenty million, four hundred forty thousand, eleven".