[go: up one dir, main page]

Search a number
-
+
21661074 = 2333671093
BaseRepresentation
bin101001010100…
…0010110010010
31111202111102000
41102220112102
521021123244
62052134430
7352054551
oct122502622
944674360
1021661074
1111255316
127307416
134645506
142c3bd98
151d7d169
hex14a8592

21661074 has 32 divisors (see below), whose sum is σ = 48311040. Its totient is φ = 7194096.

The previous prime is 21661061. The next prime is 21661097. The reversal of 21661074 is 47016612.

It is a Harshad number since it is a multiple of its sum of digits (27).

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, 19272 + ... + 20364.

It is an arithmetic number, because the mean of its divisors is an integer number (1509720).

Almost surely, 221661074 is an apocalyptic number.

21661074 is an abundant number, since it is smaller than the sum of its proper divisors (26649966).

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

21661074 is a wasteful number, since it uses less digits than its factorization.

21661074 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1471 (or 1465 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 27.

The square root of 21661074 is about 4654.1458937167. The cubic root of 21661074 is about 278.7575648640.

Adding to 21661074 its reverse (47016612), we get a palindrome (68677686).

It can be divided in two parts, 2166 and 1074, that added together give a triangular number (3240 = T80).

The spelling of 21661074 in words is "twenty-one million, six hundred sixty-one thousand, seventy-four".

Divisors: 1 2 3 6 9 18 27 54 367 734 1093 1101 2186 2202 3279 3303 6558 6606 9837 9909 19674 19818 29511 59022 401131 802262 1203393 2406786 3610179 7220358 10830537 21661074