618536020 has 24 divisors (see below), whose sum is σ = 1312320744. Its totient is φ = 244862976.

The previous prime is 618536011. The next prime is 618536021. The reversal of 618536020 is 20635816.

It can be written as a sum of positive squares in 4 ways, for example, as 23078416 + 595457604 = 4804^2 + 24402^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (618536021) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 157477 + ... + 161356.

It is an arithmetic number, because the mean of its divisors is an integer number (54680031).

Almost surely, 2^618536020 is an apocalyptic number.

It is an amenable number.

618536020 is an abundant number, since it is smaller than the sum of its proper divisors (693784724).

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

618536020 is a wasteful number, since it uses less digits than its factorization.

618536020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 318939 (or 318937 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 31.

The square root of 618536020 is about 24870.3843959035. The cubic root of 618536020 is about 852.0302196368.

The spelling of 618536020 in words is "six hundred eighteen million, five hundred thirty-six thousand, twenty".