18020120140 has 48 divisors (see below), whose sum is σ = 41746350240. Its totient is φ = 6479137280.

The previous prime is 18020120119. The next prime is 18020120141. The reversal of 18020120140 is 4102102081.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (18020120141) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 440587 + ... + 479746.

It is an arithmetic number, because the mean of its divisors is an integer number (869715630).

Almost surely, 2^18020120140 is an apocalyptic number.

18020120140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18020120140 is an abundant number, since it is smaller than the sum of its proper divisors (23726230100).

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

18020120140 is a wasteful number, since it uses less digits than its factorization.

18020120140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 920442 (or 920440 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 19.

The spelling of 18020120140 in words is "eighteen billion, twenty million, one hundred twenty thousand, one hundred forty".