18237056840 has 16 divisors (see below), whose sum is σ = 41033377980. Its totient is φ = 7294822720.

The previous prime is 18237056837. The next prime is 18237056933. The reversal of 18237056840 is 4865073281.

It can be written as a sum of positive squares in 2 ways, for example, as 17339095684 + 897961156 = 131678^2 + 29966^2 .

It is a junction number, because it is equal to n+sod(n) for n = 18237056791 and 18237056800.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 227963171 + ... + 227963250.

Almost surely, 2^18237056840 is an apocalyptic number.

18237056840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18237056840 is an abundant number, since it is smaller than the sum of its proper divisors (22796321140).

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

18237056840 is a wasteful number, since it uses less digits than its factorization.

18237056840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 455926432 (or 455926428 counting only the distinct ones).

The product of its (nonzero) digits is 322560, while the sum is 44.

The spelling of 18237056840 in words is "eighteen billion, two hundred thirty-seven million, fifty-six thousand, eight hundred forty".