518018397 has 32 divisors (see below), whose sum is σ = 779390976. Its totient is φ = 303652800.

The previous prime is 518018393. The next prime is 518018419. The reversal of 518018397 is 793810815.

It is not a de Polignac number, because 518018397 - 2² = 518018393 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (518018393) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 242022 + ... + 244152.

It is an arithmetic number, because the mean of its divisors is an integer number (24355968).

Almost surely, 2^518018397 is an apocalyptic number.

It is an amenable number.

518018397 is a deficient number, since it is larger than the sum of its proper divisors (261372579).

518018397 is a wasteful number, since it uses less digits than its factorization.

518018397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2441.

The product of its (nonzero) digits is 60480, while the sum is 42.

The square root of 518018397 is about 22760.0175087806. The cubic root of 518018397 is about 803.1223793502.

The spelling of 518018397 in words is "five hundred eighteen million, eighteen thousand, three hundred ninety-seven".