18940194 has 96 divisors (see below), whose sum is σ = 52276224. Its totient is φ = 4821120.

The previous prime is 18940183. The next prime is 18940241. The reversal of 18940194 is 49104981.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

18940194 is a Rhonda number in base 12.

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, 50592 + ... + 50964.

It is an arithmetic number, because the mean of its divisors is an integer number (544544).

Almost surely, 2^18940194 is an apocalyptic number.

18940194 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 18940194, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26138112).

18940194 is an abundant number, since it is smaller than the sum of its proper divisors (33336030).

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

18940194 is a wasteful number, since it uses less digits than its factorization.

18940194 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 432 (or 429 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 36.

The square root of 18940194 is about 4352.0333178872. The cubic root of 18940194 is about 266.5598944073.

The spelling of 18940194 in words is "eighteen million, nine hundred forty thousand, one hundred ninety-four".