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20022331 = 724011019
BaseRepresentation
bin100110001100…
…0010000111011
31101200020110211
41030120100323
520111203311
61553051551
7332121100
oct114302073
941606424
1020022331
111033608a
126856bb7
1341c0644
142932aa7
151b57821
hex131843b

20022331 has 12 divisors (see below), whose sum is σ = 23372280. Its totient is φ = 17102400.

The previous prime is 20022323. The next prime is 20022407. The reversal of 20022331 is 13322002.

It is a happy number.

It is not a de Polignac number, because 20022331 - 23 = 20022323 is a prime.

It is a super-2 number, since 2×200223312 = 801787477347122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20022631) 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 11 ways as a sum of consecutive naturals, for example, 19140 + ... + 20158.

It is an arithmetic number, because the mean of its divisors is an integer number (1947690).

Almost surely, 220022331 is an apocalyptic number.

20022331 is a deficient number, since it is larger than the sum of its proper divisors (3349949).

20022331 is a wasteful number, since it uses less digits than its factorization.

20022331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1434 (or 1427 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 13.

The square root of 20022331 is about 4474.6319401712. The cubic root of 20022331 is about 271.5427501822.

Adding to 20022331 its reverse (13322002), we get a palindrome (33344333).

The spelling of 20022331 in words is "twenty million, twenty-two thousand, three hundred thirty-one".

Divisors: 1 7 49 401 1019 2807 7133 19649 49931 408619 2860333 20022331