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20090834 = 297103561
BaseRepresentation
bin100110010100…
…0111111010010
31101210201102222
41030220333102
520120401314
61554341042
7332524601
oct114507722
941721388
1020090834
11103825a5
12688a782
13421588a
14294da38
151b6cc8e
hex1328fd2

20090834 has 8 divisors (see below), whose sum is σ = 30447228. Its totient is φ = 9941760.

The previous prime is 20090827. The next prime is 20090839. The reversal of 20090834 is 43809002.

It can be written as a sum of positive squares in 2 ways, for example, as 18515809 + 1575025 = 4303^2 + 1255^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×200908342 = 807283221631112, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20090839) 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 3 ways as a sum of consecutive naturals, for example, 51587 + ... + 51974.

Almost surely, 220090834 is an apocalyptic number.

20090834 is a deficient number, since it is larger than the sum of its proper divisors (10356394).

20090834 is a wasteful number, since it uses less digits than its factorization.

20090834 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 103660.

The product of its (nonzero) digits is 1728, while the sum is 26.

The square root of 20090834 is about 4482.2800001785. The cubic root of 20090834 is about 271.8520767919.

Adding to 20090834 its reverse (43809002), we get a palindrome (63899836).

The spelling of 20090834 in words is "twenty million, ninety thousand, eight hundred thirty-four".

Divisors: 1 2 97 194 103561 207122 10045417 20090834