1018081090 has 32 divisors (see below), whose sum is σ = 1976039856. Its totient is φ = 375425280.

The previous prime is 1018081073. The next prime is 1018081117. The reversal of 1018081090 is 901808101.

It can be written as a sum of positive squares in 8 ways, for example, as 101989801 + 916091289 = 10099^2 + 30267^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 106300 + ... + 115480.

Almost surely, 2^1018081090 is an apocalyptic number.

1018081090 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1018081090 is a deficient number, since it is larger than the sum of its proper divisors (957958766).

1018081090 is a wasteful number, since it uses less digits than its factorization.

1018081090 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10054.

The product of its (nonzero) digits is 576, while the sum is 28.

The square root of 1018081090 is about 31907.3830014309. The cubic root of 1018081090 is about 1005.9910654559.

Adding to 1018081090 its reverse (901808101), we get a palindrome (1919889191).

It can be divided in two parts, 10180810 and 90, that multiplied together give a square (916272900 = 30270²).

The spelling of 1018081090 in words is "one billion, eighteen million, eighty-one thousand, ninety".