Search a number
-
+
18397474 = 212772431
BaseRepresentation
bin100011000101…
…1100100100010
31021121200120221
41012023210202
514202204344
61454153254
7312242644
oct106134442
937550527
1018397474
11a426327
1261b282a
133a71ba4
14262c894
151936184
hex118b922

18397474 has 8 divisors (see below), whose sum is σ = 27813888. Its totient is φ = 9126180.

The previous prime is 18397471. The next prime is 18397481. The reversal of 18397474 is 47479381.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 18397474.

It is not an unprimeable number, because it can be changed into a prime (18397471) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 35962 + ... + 36469.

It is an arithmetic number, because the mean of its divisors is an integer number (3476736).

Almost surely, 218397474 is an apocalyptic number.

18397474 is a deficient number, since it is larger than the sum of its proper divisors (9416414).

18397474 is a wasteful number, since it uses less digits than its factorization.

18397474 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72560.

The product of its digits is 169344, while the sum is 43.

The square root of 18397474 is about 4289.2276694062. The cubic root of 18397474 is about 263.9891428807.

The spelling of 18397474 in words is "eighteen million, three hundred ninety-seven thousand, four hundred seventy-four".

Divisors: 1 2 127 254 72431 144862 9198737 18397474