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21433401 = 3211239413
BaseRepresentation
bin101000111000…
…0110000111001
31111022221002200
41101300300321
520441332101
62043220413
7350116023
oct121606071
944287080
1021433401
111110a260
127217709
1345959b2
142bbd013
151d35986
hex1470c39

21433401 has 24 divisors (see below), whose sum is σ = 35246016. Its totient is φ = 12423840.

The previous prime is 21433361. The next prime is 21433417. The reversal of 21433401 is 10433412.

It is not a de Polignac number, because 21433401 - 211 = 21431353 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21433421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2430 + ... + 6983.

It is an arithmetic number, because the mean of its divisors is an integer number (1468584).

Almost surely, 221433401 is an apocalyptic number.

It is an amenable number.

21433401 is a deficient number, since it is larger than the sum of its proper divisors (13812615).

21433401 is a wasteful number, since it uses less digits than its factorization.

21433401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9453 (or 9450 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 21433401 is about 4629.6221228087. The cubic root of 21433401 is about 277.7774775049. Note that the first 3 decimals are identical.

Adding to 21433401 its reverse (10433412), we get a palindrome (31866813).

The spelling of 21433401 in words is "twenty-one million, four hundred thirty-three thousand, four hundred one".

Divisors: 1 3 9 11 23 33 69 99 207 253 759 2277 9413 28239 84717 103543 216499 310629 649497 931887 1948491 2381489 7144467 21433401