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21302330 = 257347877
BaseRepresentation
bin101000101000…
…0110000111010
31111002021022012
41101100300322
520423133310
62040325522
7346031630
oct121206072
944067265
1021302330
111102a835
1271738a2
13454b13a
142b87350
151d0bc05
hex1450c3a

21302330 has 32 divisors (see below), whose sum is σ = 43998336. Its totient is φ = 7274304.

The previous prime is 21302321. The next prime is 21302371. The reversal of 21302330 is 3320312.

It is a Harshad number since it is a multiple of its sum of digits (14).

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, 23852 + ... + 24728.

It is an arithmetic number, because the mean of its divisors is an integer number (1374948).

Almost surely, 221302330 is an apocalyptic number.

21302330 is an abundant number, since it is smaller than the sum of its proper divisors (22696006).

21302330 is a wasteful number, since it uses less digits than its factorization.

21302330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1238.

The product of its (nonzero) digits is 108, while the sum is 14.

The square root of 21302330 is about 4615.4447239676. Note that the first 3 decimals coincide. The cubic root of 21302330 is about 277.2100914114.

Adding to 21302330 its reverse (3320312), we get a palindrome (24622642).

The spelling of 21302330 in words is "twenty-one million, three hundred two thousand, three hundred thirty".

Divisors: 1 2 5 7 10 14 35 70 347 694 877 1735 1754 2429 3470 4385 4858 6139 8770 12145 12278 24290 30695 61390 304319 608638 1521595 2130233 3043190 4260466 10651165 21302330