1018057813 has 4 divisors (see below), whose sum is σ = 1027572480. Its totient is φ = 1008543148.

The previous prime is 1018057811. The next prime is 1018057819. The reversal of 1018057813 is 3187508101.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 3187508101 = 2003 ⋅1591367.

It is a cyclic number.

It is not a de Polignac number, because 1018057813 - 2¹ = 1018057811 is a prime.

It is a super-2 number, since 2×1018057813² = 2072883421220685938, 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 (1018057811) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4757173 + ... + 4757386.

It is an arithmetic number, because the mean of its divisors is an integer number (256893120).

Almost surely, 2^1018057813 is an apocalyptic number.

It is an amenable number.

1018057813 is a deficient number, since it is larger than the sum of its proper divisors (9514667).

1018057813 is an equidigital number, since it uses as much as digits as its factorization.

1018057813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9514666.

The product of its (nonzero) digits is 6720, while the sum is 34.

The square root of 1018057813 is about 31907.0182405063. The cubic root of 1018057813 is about 1005.9833985379.

The spelling of 1018057813 in words is "one billion, eighteen million, fifty-seven thousand, eight hundred thirteen".