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21002342 = 210501171
BaseRepresentation
bin101000000011…
…1100001100110
31110112000210112
41100013201212
520334033332
62030053022
7343342214
oct120074146
943460715
1021002342
1110945409
12704a172
13447472a
142b09cb4
151c9cdb2
hex1407866

21002342 has 4 divisors (see below), whose sum is σ = 31503516. Its totient is φ = 10501170.

The previous prime is 21002341. The next prime is 21002357. The reversal of 21002342 is 24320012.

It is a semiprime because it is the product of two primes.

It is a super-3 number, since 3×210023423 (a number of 23 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21002341) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5250584 + ... + 5250587.

It is an arithmetic number, because the mean of its divisors is an integer number (7875879).

Almost surely, 221002342 is an apocalyptic number.

21002342 is a deficient number, since it is larger than the sum of its proper divisors (10501174).

21002342 is a wasteful number, since it uses less digits than its factorization.

21002342 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10501173.

The product of its (nonzero) digits is 96, while the sum is 14.

The square root of 21002342 is about 4582.8312209812. The cubic root of 21002342 is about 275.9026734480.

Adding to 21002342 its reverse (24320012), we get a palindrome (45322354).

The spelling of 21002342 in words is "twenty-one million, two thousand, three hundred forty-two".

Divisors: 1 2 10501171 21002342