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20933229 = 36977743
BaseRepresentation
bin100111111011…
…0101001101101
31110101111222210
41033312221231
520324330404
62024401033
7342633552
oct117665155
943344883
1020933229
11108a8499
127016179
13444c135
142acca29
151c87689
hex13f6a6d

20933229 has 4 divisors (see below), whose sum is σ = 27910976. Its totient is φ = 13955484.

The previous prime is 20933207. The next prime is 20933249. The reversal of 20933229 is 92233902.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 20933229 - 215 = 20900461 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20933196 and 20933205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20933249) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3488869 + ... + 3488874.

It is an arithmetic number, because the mean of its divisors is an integer number (6977744).

Almost surely, 220933229 is an apocalyptic number.

It is an amenable number.

20933229 is a deficient number, since it is larger than the sum of its proper divisors (6977747).

20933229 is an equidigital number, since it uses as much as digits as its factorization.

20933229 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6977746.

The product of its (nonzero) digits is 5832, while the sum is 30.

The square root of 20933229 is about 4575.2845813129. The cubic root of 20933229 is about 275.5997006309.

The spelling of 20933229 in words is "twenty million, nine hundred thirty-three thousand, two hundred twenty-nine".

Divisors: 1 3 6977743 20933229