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18349572 = 2237320947
BaseRepresentation
bin100010111111…
…1111000000100
31021112020212210
41011333320010
514144141242
61453143420
7311653203
oct105777004
937466783
1018349572
11a3a333a
12618ab70
133a56147
14261923a
151926d9c
hex117fe04

18349572 has 24 divisors (see below), whose sum is σ = 43404256. Its totient is φ = 6032448.

The previous prime is 18349571. The next prime is 18349577. The reversal of 18349572 is 27594381.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 18349572.

It is not an unprimeable number, because it can be changed into a prime (18349571) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9598 + ... + 11349.

Almost surely, 218349572 is an apocalyptic number.

18349572 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

18349572 is an abundant number, since it is smaller than the sum of its proper divisors (25054684).

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

18349572 is a wasteful number, since it uses less digits than its factorization.

18349572 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21027 (or 21025 counting only the distinct ones).

The product of its digits is 60480, while the sum is 39.

The square root of 18349572 is about 4283.6400408998. The cubic root of 18349572 is about 263.7598251845.

The spelling of 18349572 in words is "eighteen million, three hundred forty-nine thousand, five hundred seventy-two".