18061494 has 32 divisors (see below), whose sum is σ = 39726720. Its totient is φ = 5428800.

The previous prime is 18061487. The next prime is 18061501. The reversal of 18061494 is 49416081.

It is an interprime number because it is at equal distance from previous prime (18061487) and next prime (18061501).

It is a Harshad number since it is a multiple of its sum of digits (33).

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, 7602 + ... + 9690.

It is an arithmetic number, because the mean of its divisors is an integer number (1241460).

Almost surely, 2^18061494 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18061494, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19863360).

18061494 is an abundant number, since it is smaller than the sum of its proper divisors (21665226).

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

18061494 is a wasteful number, since it uses less digits than its factorization.

18061494 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2236.

The product of its (nonzero) digits is 6912, while the sum is 33.

The square root of 18061494 is about 4249.8816454108. The cubic root of 18061494 is about 262.3722444089.

The spelling of 18061494 in words is "eighteen million, sixty-one thousand, four hundred ninety-four".