18891054 has 96 divisors (see below), whose sum is σ = 53114880. Its totient is φ = 4712256.

The previous prime is 18891043. The next prime is 18891071. The reversal of 18891054 is 45019881.

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, 30819 + ... + 31425.

It is an arithmetic number, because the mean of its divisors is an integer number (553280).

Almost surely, 2^18891054 is an apocalyptic number.

18891054 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 18891054, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26557440).

18891054 is an abundant number, since it is smaller than the sum of its proper divisors (34223826).

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

18891054 is a wasteful number, since it uses less digits than its factorization.

18891054 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 654 (or 651 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 36.

The square root of 18891054 is about 4346.3840143273. The cubic root of 18891054 is about 266.3291664340.

The spelling of 18891054 in words is "eighteen million, eight hundred ninety-one thousand, fifty-four".