18851040 has 288 divisors, whose sum is σ = 74299680. Its totient is φ = 4313088.

The previous prime is 18851029. The next prime is 18851057. The reversal of 18851040 is 4015881.

18851040 is nontrivially palindromic in base 11.

It is a tau number, because it is divible by the number of its divisors (288).

It is a junction number, because it is equal to n+sod(n) for n = 18850995 and 18851013.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 355654 + ... + 355706.

It is an arithmetic number, because the mean of its divisors is an integer number (257985).

Almost surely, 2^18851040 is an apocalyptic number.

18851040 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 18851040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37149840).

18851040 is an abundant number, since it is smaller than the sum of its proper divisors (55448640).

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

18851040 is a wasteful number, since it uses less digits than its factorization.

18851040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106 (or 95 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 27.

The square root of 18851040 is about 4341.7784374609. The cubic root of 18851040 is about 266.1409922076.

The spelling of 18851040 in words is "eighteen million, eight hundred fifty-one thousand, forty".