18101781140 has 24 divisors (see below), whose sum is σ = 38044672512. Its totient is φ = 7234820640.

The previous prime is 18101781119. The next prime is 18101781157. The reversal of 18101781140 is 4118710181.

It is a junction number, because it is equal to n+sod(n) for n = 18101781097 and 18101781106.

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, 343004 + ... + 392243.

It is an arithmetic number, because the mean of its divisors is an integer number (1585194688).

Almost surely, 2^18101781140 is an apocalyptic number.

18101781140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18101781140 is an abundant number, since it is smaller than the sum of its proper divisors (19942891372).

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

18101781140 is a wasteful number, since it uses less digits than its factorization.

18101781140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 736487 (or 736485 counting only the distinct ones).

The product of its (nonzero) digits is 1792, while the sum is 32.

The spelling of 18101781140 in words is "eighteen billion, one hundred one million, seven hundred eighty-one thousand, one hundred forty".