18835505140 has 24 divisors (see below), whose sum is σ = 40830515712. Its totient is φ = 7291163040.

The previous prime is 18835505123. The next prime is 18835505197. The reversal of 18835505140 is 4150553881.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 18835505093 and 18835505102.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15189304 + ... + 15190543.

It is an arithmetic number, because the mean of its divisors is an integer number (1701271488).

Almost surely, 2^18835505140 is an apocalyptic number.

18835505140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18835505140 is an abundant number, since it is smaller than the sum of its proper divisors (21995010572).

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

18835505140 is a wasteful number, since it uses less digits than its factorization.

18835505140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30379887 (or 30379885 counting only the distinct ones).

The product of its (nonzero) digits is 96000, while the sum is 40.

The spelling of 18835505140 in words is "eighteen billion, eight hundred thirty-five million, five hundred five thousand, one hundred forty".