18888511340 has 48 divisors (see below), whose sum is σ = 41196556800. Its totient is φ = 7269296832.

The previous prime is 18888511331. The next prime is 18888511361. The reversal of 18888511340 is 4311588881.

It is a Harshad number since it is a multiple of its sum of digits (47).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 114830 + ... + 225749.

It is an arithmetic number, because the mean of its divisors is an integer number (858261600).

Almost surely, 2^18888511340 is an apocalyptic number.

18888511340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18888511340 is an abundant number, since it is smaller than the sum of its proper divisors (22308045460).

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

18888511340 is a wasteful number, since it uses less digits than its factorization.

18888511340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 340694 (or 340692 counting only the distinct ones).

The product of its (nonzero) digits is 245760, while the sum is 47.

The spelling of 18888511340 in words is "eighteen billion, eight hundred eighty-eight million, five hundred eleven thousand, three hundred forty".