18868255240 has 32 divisors (see below), whose sum is σ = 42603612480. Its totient is φ = 7520628672.

The previous prime is 18868255201. The next prime is 18868255249. The reversal of 18868255240 is 4255286881.

It is a super-2 number, since 2×18868255240² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (18868255249) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 822084 + ... + 844723.

It is an arithmetic number, because the mean of its divisors is an integer number (1331362890).

Almost surely, 2^18868255240 is an apocalyptic number.

18868255240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18868255240 is an abundant number, since it is smaller than the sum of its proper divisors (23735357240).

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

18868255240 is a wasteful number, since it uses less digits than its factorization.

18868255240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1667101 (or 1667097 counting only the distinct ones).

The product of its (nonzero) digits is 1228800, while the sum is 49.

The spelling of 18868255240 in words is "eighteen billion, eight hundred sixty-eight million, two hundred fifty-five thousand, two hundred forty".