1018020981 has 8 divisors (see below), whose sum is σ = 1377620704. Its totient is φ = 668550960.

The previous prime is 1018020977. The next prime is 1018021019. The reversal of 1018020981 is 1890208101.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1018020981 - 2² = 1018020977 is a prime.

It is a super-2 number, since 2×1018020981² = 2072733435512404722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1018020961) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 2532190 + ... + 2532591.

It is an arithmetic number, because the mean of its divisors is an integer number (172202588).

Almost surely, 2^1018020981 is an apocalyptic number.

It is an amenable number.

1018020981 is a deficient number, since it is larger than the sum of its proper divisors (359599723).

1018020981 is an equidigital number, since it uses as much as digits as its factorization.

1018020981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5064851.

The product of its (nonzero) digits is 1152, while the sum is 30.

The square root of 1018020981 is about 31906.4410581939. The cubic root of 1018020981 is about 1005.9712666705.

The spelling of 1018020981 in words is "one billion, eighteen million, twenty thousand, nine hundred eighty-one".