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20223405 = 335149803
BaseRepresentation
bin100110100100…
…1010110101101
31102001110022000
41031021112231
520134122110
62001242513
7333616236
oct115112655
942043260
1020223405
1110463164
126933439
134261017
14298608d
151b971c0
hex13495ad

20223405 has 16 divisors (see below), whose sum is σ = 35952960. Its totient is φ = 10785744.

The previous prime is 20223403. The next prime is 20223443. The reversal of 20223405 is 50432202.

It is not a de Polignac number, because 20223405 - 21 = 20223403 is a prime.

It is a super-2 number, since 2×202234052 = 817972219588050, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20223403) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 74767 + ... + 75036.

It is an arithmetic number, because the mean of its divisors is an integer number (2247060).

Almost surely, 220223405 is an apocalyptic number.

It is an amenable number.

20223405 is a deficient number, since it is larger than the sum of its proper divisors (15729555).

20223405 is a wasteful number, since it uses less digits than its factorization.

20223405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 149817 (or 149811 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 18.

The square root of 20223405 is about 4497.0440291374. The cubic root of 20223405 is about 272.4487123969.

Adding to 20223405 its reverse (50432202), we get a palindrome (70655607).

The spelling of 20223405 in words is "twenty million, two hundred twenty-three thousand, four hundred five".

Divisors: 1 3 5 9 15 27 45 135 149803 449409 749015 1348227 2247045 4044681 6741135 20223405