18057140 has 48 divisors (see below), whose sum is σ = 39674880. Its totient is φ = 6894720.

The previous prime is 18057107. The next prime is 18057173. The reversal of 18057140 is 4175081.

It is an interprime number because it is at equal distance from previous prime (18057107) and next prime (18057173).

It is a congruent number.

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, 94445 + ... + 94635.

It is an arithmetic number, because the mean of its divisors is an integer number (826560).

Almost surely, 2^18057140 is an apocalyptic number.

18057140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18057140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19837440).

18057140 is an abundant number, since it is smaller than the sum of its proper divisors (21617740).

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

18057140 is a wasteful number, since it uses less digits than its factorization.

18057140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 392 (or 390 counting only the distinct ones).

The product of its (nonzero) digits is 1120, while the sum is 26.

The square root of 18057140 is about 4249.3693649764. The cubic root of 18057140 is about 262.3511597641.

The spelling of 18057140 in words is "eighteen million, fifty-seven thousand, one hundred forty".