1081091020 has 24 divisors (see below), whose sum is σ = 2270919168. Its totient is φ = 432316800.

The previous prime is 1081091017. The next prime is 1081091023. The reversal of 1081091020 is 201901801.

It is an interprime number because it is at equal distance from previous prime (1081091017) and next prime (1081091023).

It is a junction number, because it is equal to n+sod(n) for n = 1081090982 and 1081091000.

It is not an unprimeable number, because it can be changed into a prime (1081091023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 118005 + ... + 126835.

It is an arithmetic number, because the mean of its divisors is an integer number (94621632).

Almost surely, 2^1081091020 is an apocalyptic number.

1081091020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1081091020 is an abundant number, since it is smaller than the sum of its proper divisors (1189828148).

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

1081091020 is a wasteful number, since it uses less digits than its factorization.

1081091020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14961 (or 14959 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 22.

The square root of 1081091020 is about 32879.9486009331. The cubic root of 1081091020 is about 1026.3309365415.

Adding to 1081091020 its reverse (201901801), we get a palindrome (1282992821).

The spelling of 1081091020 in words is "one billion, eighty-one million, ninety-one thousand, twenty".