Search a number
-
+
18689996 = 22131918917
BaseRepresentation
bin100011101001…
…0111111001100
31022011112212002
41013102333030
514241034441
61504331432
7314601533
oct107227714
938145762
1018689996
11a606086
126313b78
133b45090
1426a731a
151992b9b
hex11d2fcc

18689996 has 24 divisors (see below), whose sum is σ = 37079280. Its totient is φ = 8171712.

The previous prime is 18689989. The next prime is 18690019. The reversal of 18689996 is 69998681.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8471 + ... + 10446.

It is an arithmetic number, because the mean of its divisors is an integer number (1544970).

Almost surely, 218689996 is an apocalyptic number.

It is an amenable number.

18689996 is a deficient number, since it is larger than the sum of its proper divisors (18389284).

18689996 is a wasteful number, since it uses less digits than its factorization.

18689996 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18953 (or 18951 counting only the distinct ones).

The product of its digits is 1679616, while the sum is 56.

The square root of 18689996 is about 4323.1928016224. The cubic root of 18689996 is about 265.3809449392.

The spelling of 18689996 in words is "eighteen million, six hundred eighty-nine thousand, nine hundred ninety-six".

Divisors: 1 2 4 13 19 26 38 52 76 247 494 988 18917 37834 75668 245921 359423 491842 718846 983684 1437692 4672499 9344998 18689996